Open Loops: Why Unfinished Things Keep Pulling at You
An open loop is any commitment you have made that is still unfinished and still being tracked by your head instead of by something outside it. The term comes from David Allen’s Getting Things Done, and it names the exact thing that makes a quiet afternoon feel busy. You close a loop by deciding what happens next and putting that somewhere you trust, which is a smaller job than finishing the task.
Five kinds cover most of them, and each one has its own way out.
| Kind of open loop | What it sounds like in your head | What closes it |
|---|---|---|
| A promise you made to someone | ”I said I would send that over” | A next action with a when and a where |
| A decision you keep re-opening | ”I still have to sort out the flights” | Decide once, then write the decision down |
| Something you are waiting on | ”Did they ever get back to me?” | A waiting list with a name and a date |
| A task you left in the middle | ”I stopped halfway through that” | One line on where you stopped |
| An idea you do not want to lose | ”I should really look into that” | A someday list you revisit on purpose |
What an open loop actually is
The definition worth keeping comes from the David Allen Company’s own coaching material: “Every commitment unfinished is an ‘open loop’; and when it is tracked in your psyche, instead of your system, it will require energy and attention to track and maintain” (Kelly Forrister, Getting Things Done). The rule that follows is short. Every open loop belongs in a collection you trust rather than in your head.
The GTD material adds a second half that most summaries drop. A loop stays open not only because the work is undone, but because you have not clarified what the thing means or what to do about it (David Allen Company). An unclarified commitment costs more than a clear one, because every time it surfaces you pay the thinking cost again.
A to-do item is already clarified and already parked. An open loop is the raw commitment before either of those things happened, which is why the count of your open loops is usually much higher than the length of your list.
Where open loops come from
Ordinary life, mostly. You agree to something in a hallway. You read an email and decide to answer it later. A form arrives, and you set it down because you do not have the account number to hand. None of these require you to be disorganized. Each one opens a loop the moment it enters your attention without a decision attached.
They also stack. A week that contains one hard thing and thirty small unclarified ones will feel worse than a week with three hard things and nothing else pending. That stacking is most of what people mean by mental clutter, and open loops are one of its most common sources.
Two habits open loops faster than anything else. Saying yes without writing it down anywhere, and reading something you cannot act on right now. Both feel free at the time, because the cost arrives later and arrives as a vague feeling instead of a bill.
Why open loops cost you something
Your head is a poor place to store commitments. Working memory, the small pool of things you can hold and use at once, runs to about four chunks for a healthy adult under careful test conditions, rather than the familiar seven (Cowan, 2001). Cowan’s own framing is a range of three to five depending on the task. Twelve open loops do not fit, so your head keeps cycling through them to check they are all still there.
An intention you have not recorded stays switched on. Goschke and Kuhl found that words belonging to a script participants intended to carry out were recognized faster than words from a script they had only memorized, which they read as evidence that intentions stay in a heightened state of activation until they are done (Goschke and Kuhl, 1993). Later work found this holds under some conditions and not others, so treat it as a tendency rather than a constant. The activation is useful when it makes you remember the thing at the right moment. It is expensive when it fires at 11pm.
A specific plan quiets the pull before any of the work is done. Across their studies, Masicampo and Baumeister found that unfulfilled goals produced intrusive thoughts and interference, and that writing a specific plan for the goal removed that interference, even though the task itself was still untouched (Masicampo and Baumeister, 2011). The plans that worked were specific about how and when the thing would get done. A vague reminder to “deal with the taxes” does not do this. “Sunday at 9am, gather receipts at my desk” does.
Writing it down only helps if you believe the place you wrote it. Storm and Stone showed that saving a file before studying new material improved memory for the new material, an effect they called saving-enhanced memory (Storm and Stone, 2015). The important detail is the condition: the benefit disappeared when the saving was unreliable. Your head will only let go of a loop it believes has landed somewhere real. This is the mechanism behind cognitive offloading generally, which is the use of the world outside your head to carry part of the thinking (Risko and Gilbert, 2016).
That last point is the whole reason a notes app full of things you never reopen does not make you feel better. The loop is written down and still open, because nothing about it was decided and nothing brings you back to it.
How to close an open loop
Five steps, and only the first one is urgent. A pen and the back of an envelope run all of them.
1. Catch it the moment you notice it
The moment a commitment enters your head is the cheapest moment to record it, because you are already holding it. Write the raw version. “Email Dana about the invoice” is enough, and so is “invoice thing, Dana”. Capture is not the place to be tidy. If you have twenty of them backed up already, empty them all in one pass first, which is what a brain dump is for.
2. Name what done looks like
For anything larger than a single action, say what would make it finished. “Passport sorted” means the new passport is in the drawer. This takes about four seconds and it stops the loop from re-opening every time you look at it and think “what is this about again?“
3. Decide the very next physical action
The next action is the smallest visible thing you could do, described the way you would describe it to someone else’s hands. “Find the renewal form URL” rather than “sort out passport”. Vague items stay open because there is nothing to start. This is where most loops fail to close, and where task initiation gets much easier as a side effect.
4. Put it somewhere you trust
One place, not five. The test is simple: if you would still feel a need to double-check that it is there, the place is not trusted yet, and your head will keep holding the loop as backup. Trust here comes from track record: whether the place has ever lost something you put in it.
5. Review the whole set on a schedule
A trusted place stays trusted only if you go back to it. Allen’s weekly review exists for exactly this, and there is a checklist for it on the official GTD site. Once a week is plenty for most people, and a short daily review handles the rest. Skip reviews for a month and the loops move back into your head, because your head no longer believes the list is current.
The loops that hide: things you are waiting on
The loops people miss are the ones belonging to somebody else. You sent the email, so the task feels done, and then a background part of your attention starts checking whether a reply ever came. Nothing is on your list, and yet something is running.
GTD’s answer is a waiting list: a single place for everything you have handed off, each line carrying who has it and when you asked. “Waiting: Dana, invoice, asked 2 Sept.” One glance at that list during your review replaces a dozen small acts of wondering. Few people keep one, and it pays for itself in a single review.
Open loops at 2am
Night is when open loops get loud, because there is nothing else competing for the slots. In a sleep-lab study, people who spent five minutes writing a specific to-do list for the next day fell asleep faster than people who wrote about what they had already finished, and the more specific the list, the faster they dropped off (Scullin et al., 2018). That is one small controlled study measuring how quickly people fell asleep, not a treatment for insomnia, and it is worth reading that way.
The practical version is a notepad by the bed and a rule that the list is for next actions rather than for solving anything. Racing thoughts at night covers what to do when the thoughts are not tasks at all.
Open loops and ADHD
If open loops feel heavier for you than the advice around them assumes, that is a load difference rather than an effort difference. A meta-analysis of 38 adult studies found moderate group-level working memory differences in ADHD, effect sizes of about 0.55 for phonological working memory and 0.49 for the visuospatial kind (Alderson, Kasper, Hudec and Patros, 2013). Those are averages with wide variation, so they describe a group rather than any one person.
Working memory is among the executive functions affected in ADHD (CHADD), and it is the exact function open loops draw on. The same handful of loops can cost one person far more than another, with wide variation between individuals. The useful response is to lower how many you are holding at all, which is what steps one and four above are for. ADHD and working memory goes further into the mechanism.
How Whit fits
The loop above, catch it then clarify it then park it somewhere trusted, is the loop Whit is built to run. Whit is a calm brain dump and daily planner for iPhone, iPad, and Mac. You capture by text or voice in the moment you notice the commitment, and it lands in a Calm Inbox rather than a wall of red badges, so nothing forces a decision at the point of capture. That is step one, made cheap enough that you will do it.
Steps three and four are where a tool earns its place. When you are ready, the few loops that matter today become a Visual Day, a gentle timeline from sunrise to night, which is the point where a loop stops being a nagging item and becomes something with a time attached. Projects and Milestones hold the larger loops that need more than one action. You can see everything Whit does, or read how it compares to Todoist if you are weighing a more traditional list app.
The trust part matters here more than the features. Whit syncs only through your own iCloud, with no accounts, no logins, and no analytics in the app, so the place you put your loops belongs to you.
What the research does and does not say
One famous claim in this territory has not held up, and it is worth being straight about.
The Zeigarnik effect, the idea that you remember unfinished tasks better than finished ones, is the usual opening move in articles about open loops. A 2025 meta-analysis found no reliable memory advantage: setting aside Zeigarnik’s own 1927 study, the recall ratio across 37 publications came out at 0.99, which is no difference at all (Ghibellini and Meier, 2025). What the same paper did find was a general tendency to go back to interrupted tasks, called the Ovsiankina effect, with a resumption rate near 67 percent across 20 publications. So the pull to return to unfinished things looks real. The claim that you remember them better does not.
Two other honest notes. GTD as a complete system has been analyzed against cognitive science (Heylighen and Vidal, 2008) but has not been through a controlled trial, so treat it as a well-reasoned method rather than a proven one. And the Masicampo and Baumeister planning result, which is the strongest single support for closing loops by planning them, rests mostly on that one paper and has not accumulated a large direct replication record. It is worth acting on and not worth overstating.
What holds up: working memory is small, intentions stay active until they are done or specifically planned, specific plans quiet unfinished goals, offloading works when the storage is reliable, and a five-minute bedtime list helps people fall asleep faster. If a constantly full head comes with real anxiety or low mood, or is getting in the way of sleeping or functioning, that is worth raising with a doctor or therapist. Whit is a calm productivity tool and not a medical or mental-health treatment.
Frequently asked questions
What is an open loop?
An open loop is any unfinished commitment your head is still tracking because it has not been clarified and recorded somewhere you trust. The term comes from David Allen’s Getting Things Done. It covers promises, undecided decisions, half-finished tasks, and things you are waiting on other people for.
How do you close an open loop?
Write it down, say what finished would look like, decide the smallest next physical action, and park all of that in one place you go back to on a schedule. Closing a loop means the decision is made and recorded. Doing the work is a separate event that can happen later.
Do you have to finish the task to stop it bothering you?
No. Masicampo and Baumeister found that writing a specific plan for an unfulfilled goal removed the intrusive thoughts it was causing, with none of the work done. The plan has to be specific about how and when. A vague note does not have the same effect.
Why do open loops keep me awake?
At night there is nothing competing for your attention, so unrecorded intentions surface. A five-minute, specific to-do list for the next day helped people fall asleep faster in one sleep-lab study. Keep the list to next actions rather than trying to solve anything in bed.
Related reading
- Twenty loops backed up? Start with what a brain dump is and how to do one.
- Want the full clear-out version? Read how to clear your mind.
- Curious what else fills a head besides loops? See mental clutter.
- Loops that will not turn into a first step? Read about task initiation.
Where to start
Set a timer for five minutes and write down every commitment you can think of, in any order, without sorting. Then take only the three that are loudest and give each one a next action with a day attached. You do not have to do any of them today. The quiet you feel afterwards comes from the deciding, not the doing.
If you want a calm place to put the loops down, Whit is a one-time purchase for iPhone, iPad, and Mac. There is a 7-day free trial, then $99 once with no subscription. See the details.