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How to do a brain dump, and what to do with the list after

A brain dump means writing down everything that’s on your mind, so it stops circling around your head. The writing takes about ten minutes. The part that actually makes you feel lighter comes after the writing, and it’s the part most people skip.

By the designer who makes Morrow · 17 October 2026 · Updated 18 October 2026 · 5 min read

What is a brain dump?

It’s about as simple as an exercise gets. You take everything on your mind and put it on paper or on a screen: tasks, worries, ideas, errands, the thing you promised a friend last week. You don’t sort while you write. You just get it out.

Most people reach for one when their head feels full. Before a busy week, after a holiday, at the start of a new job. Or at eleven at night, when you can’t sleep because you keep remembering things.

Why do unfinished tasks keep coming back?

You probably know the feeling. You’re cooking and you remember the email you didn’t send. In the shower you think of the form for school. Those thoughts aren’t random. Things you haven’t finished tend to pull at your attention.

For a long time this was explained with the Zeigarnik effect, from a 1927 study by Bluma Zeigarnik: the idea that people remember unfinished tasks better than finished ones. Newer research is more careful. A 2025 review of the studies since then found no general memory advantage for unfinished tasks. It did find something else: a clear tendency to go back to a task you didn’t finish.²

So the pull is real. Your mind wants to return to open loops. The useful question is what lets it rest.

What actually quiets your mind?

Here the research is surprisingly clear. In a series of studies, the psychologists E. J. Masicampo and Roy Baumeister gave people a goal they couldn’t finish yet. Those people had more stray thoughts about it while doing something else, and they did worse on an unrelated task. Then some of them wrote a specific plan for the goal: what they would do, and when. For them, the effect went away. Making the plan was enough, before any of the work was done.¹

That’s the point most brain dump advice misses. Writing everything down gets it out of your head, but the calm comes from deciding: when you’ll do something, where it lives, or that you won’t do it at all. It’s also why I don’t think a capture tool is finished when it has saved your text. Saving is the easy half.

How to do a brain dump, step by step

1. Set a timer for ten minutes. A short limit stops it from turning into a planning session.
2. Write one thing per line. “Call the plumber back.” “Renew the insurance.” “Birthday present for Anna.” Keep each line short, so it reads like something you can actually do.
3. Don’t sort and don’t judge. Big and small, work and home, all on one list. If it’s on your mind, it goes on the list.
4. Use prompts when you slow down. Walk through the parts of your life: work, home, money, health, people you owe a reply, things to buy, things you keep putting off.
5. Stop when the timer ends. You’ll think of more later. That’s fine. Add it when it comes.

What to do with the list after

This is the step that matters, so give it the same ten minutes.

1. Cross out what isn’t a task. Some lines are worries, not things to do. Some aren’t worth doing any more. Let them go.
2. Do the two-minute ones. Right now, or together in one short session later today.
3. Give every other line a home. Group them by project or part of your life: work, the house, a trip. A line in the right place is a line you can find again.
4. Turn vague lines into a first step. “Sort out the garden” isn’t a task. “Buy compost” is.
5. Choose a few for today. Three to five is a good number to start with (how many tasks fit in a day explains why). Everything else stays on the list until you choose it.

The list isn’t a plan for today. It’s a store. Today is a small choice from it, and keeping those two apart is most of the trick.

How often should you do a brain dump?

Whenever your head feels full. Some people do one every Sunday evening, so the week starts calm. Others take five minutes every morning. If you write new things down the moment they come up during the week, you’ll need a big one less often.

Where it tends to go wrong

Sorting while you write is the most common one. It slows you down, and you stop before your head is actually empty. Close behind it: keeping the list in three places. One list you trust beats three lists you have to check.

Then there’s putting everything on today. A long list for one day is a promise you can’t keep, and it brings the stress right back. And finally, never looking at the list again. A list you don’t review becomes one more thing on your mind. A short look at the end of each day keeps it honest.