The Carry Method

Part VI · Living It

Make It Stick: ADHD, Anxiety and Habit

Every method works for two weeks. This chapter is about the third one — and about the people for whom capture isn't a productivity preference but a lifeline, because their working memory drops things by default.

Why capture matters more with ADHD

Everything this guide said about working memory being small — about four things — applies double here. A meta-analysis by Martinussen and colleagues, comparing children with and without ADHD, found consistent, marked working-memory deficits, especially in holding and manipulating information. Russell Barkley, one of the field's most cited researchers, built his influential model of ADHD around executive function — and the practical prescription he has repeated across his clinical guides has been consistent for decades: stop asking the inside of the head to hold what it demonstrably drops, and externalize— put the information out in the world, at the time and place where it's needed.

That is, almost word for word, what this method is. The page holds it, so the head doesn't have to. The difference ADHD makes is the stakes: when the cost of "I'll remember it" is near certain loss, capture has to be reachable in one gesture, in the moment, with zero decisions in the way. Any system that asks "which project does this belong to?" before saving a thought has already lost the race against the next thought.

The friction budget

Think of motivation as a budget that shrinks on bad days. Every step between a thought and its capture — unlock, find the app, pick a category, name it — spends from that budget. On a good day you can afford five steps. On the day you actually need the system, you can afford one. Build for the bad day: capture first, decide later, in the calm two minutes of migration when choosing is cheap.

The system that works is the one that's still there on a bad day.

The 66 days: what habit formation really looks like

You've heard "21 days to form a habit." The actual data is less tidy and more forgiving. Phillippa Lally and colleagues tracked 96 people repeating a chosen daily behavior for twelve weeks, modeling how automatic it became. The median time to peak automaticity was 66 days — with a range from 18 to 254. Three findings matter for us:

  1. Simpler behaviors became automatic sooner.A one-line capture is about as simple as a behavior gets — that's by design.
  2. Missing one day didn't derail the process. The data showed single missed opportunities had no material effect on the curve. Skipping is normal; quitting over skipping is the failure mode.
  3. Same context, same cue. Habits formed by repeating the behavior in a consistent context — which is why anchoring works.

Anchor it to a moment that already exists

Don't rely on remembering to capture — that's asking the weakest muscle to carry the system. Tie it to something that already happens: when I sit down with coffee, I dump whatever's in my head; when I close the laptop, I run the two-minute close. These "when X, then Y" plans are implementation intentions, the when-where-how move from chapter five, with meta-analytic support across ninety-four studies. The habit isn't "use the system." The habit is "coffee, then dump." The system follows.

The quiet loop: capture and anxiety

This guide has been careful with the word anxiety, and it's worth being careful one last time. What the evidence supports is specific: writing pending tasks before bed helped people fall asleep faster, and giving worries a concrete plan reduced their intrusiveness. Both are covered in chapter two. If your head gets loud at night, the practice that fits the evidence is exactly the one you already know: dump, make it specific, trust the page.

What the evidence does not say

Plainly: Carry is not a treatment for ADHD or anxiety, and nothing in this guide diagnoses, treats, or replaces professional care. No study has tested this method clinically. The working-memory research describes group averages, not any individual. What the evidence does support is the design direction — externalize what the head drops, make the externalizing nearly free, anchor it to existing routines, and forgive missed days. If ADHD or anxiety is weighing on your life, this method can sit alongside proper support. It is a notebook, not a clinician.

Frequently asked questions

Does this method work for ADHD?

It aligns with what ADHD researchers have long recommended — externalizing information instead of relying on working memory — and frictionless capture lowers the cost of using it on a bad day. But it is a support, not a treatment, and no study has tested this method clinically.

What if I abandon the system for a week?

Then you do one brain dump and you're back. Habit research found that missing single opportunities didn't materially hurt habit formation — the all-or-nothing feeling is the real enemy. A system with no backlog has nothing to catch up on.

How long until capture becomes automatic?

In the best-known study of real-world habit formation, automaticity took a median of 66 days — but ranged from 18 to 254 depending on the person and the behavior. Simpler actions got automatic faster, which is an argument for keeping capture tiny.

What's the best moment to anchor the habit?

Tie it to something that already happens daily: with the morning coffee, on the commute, lights-out. Plans of the form "when X, I do Y" are among the best-replicated tools in psychology for following through.

References

  1. Martinussen, R., Hayden, J., Hogg-Johnson, S., & Tannock, R. (2005). A meta-analysis of working memory impairments in children with attention-deficit/hyperactivity disorder. Journal of the American Academy of Child & Adolescent Psychiatry, 44(4), 377–384. link
  2. Barkley, R. A. (1997). Behavioral inhibition, sustained attention, and executive functions: Constructing a unifying theory of ADHD. Psychological Bulletin, 121(1), 65–94.
  3. Barkley, R. A. (2012). Executive Functions: What They Are, How They Work, and Why They Evolved. Guilford Press.
  4. Lally, P., van Jaarsveld, C. H. M., Potts, H. W. W., & Wardle, J. (2010). How are habits formed: Modelling habit formation in the real world. European Journal of Social Psychology, 40(6), 998–1009. link
  5. Gollwitzer, P. M., & Sheeran, P. (2006). Implementation intentions and goal achievement: A meta-analysis of effects and processes. Advances in Experimental Social Psychology, 38, 69–119. link
  6. Scullin, M. K., Krueger, M. L., Ballard, H. K., Pruett, N., & Bliwise, D. L. (2018). The effects of bedtime writing on difficulty falling asleep. Journal of Experimental Psychology: General, 147(1), 139–146. PubMed
  7. Masicampo, E. J., & Baumeister, R. F. (2011). Consider it done! Plan making can eliminate the cognitive effects of unfulfilled goals. Journal of Personality and Social Psychology, 101(4), 667–683. PDF