Habit Stacking: Does Linking Habits Actually Work?
The behavioral research behind habit stacking, why anchoring new habits to existing routines works, and how to actually do it.
Do a new habit right after an existing one, and it supposedly sticks better. Popularized under the name habit stacking, the underlying idea is older and simpler than the trendy name suggests, and there’s real behavioral research behind why it works.
What the Research Actually Found
A well-known exploratory study on flossing habit formation found that anchoring a new behavior to an already-established daily routine, like right after brushing your teeth, made the new habit meaningfully easier to establish than trying to build it around an arbitrary time of day. The existing routine works as a reliable, automatic cue that doesn’t require you to remember or actively monitor the clock.
Why This Actually Works
Two things make an existing routine a better trigger than a time-based reminder. First, routines happen reliably and automatically, so the cue to act shows up without you needing to notice a clock or set an alarm. Second, finishing one habitual action naturally cues your brain to look for what comes next, the same mental mechanism your existing implementation-intention if-then plans rely on, covered in our goal-setting science guide.
How to Actually Stack a Habit
- Pick a routine you already do every single day without fail, coffee, brushing your teeth, sitting down at your desk.
- Attach one new, small habit directly after it, not before, so the existing action is the trigger. After I pour my morning coffee, I will do 10 push-ups.
- Keep the new habit genuinely small at first. The research on this pairs well with the same logic behind our two-minute rule guide, a tiny version of the habit is far more likely to actually happen.
- Don’t stack more than one or two new habits onto the same anchor at once. Overloading a single cue makes each individual habit less reliable.
The Honest Caveat
This research is exploratory and behavior-specific (flossing), not a large randomized trial across every possible habit, so treat it as a genuinely useful, well-supported starting principle rather than a guaranteed formula. It also works best alongside, not instead of, the broader discipline strategies in our discipline guide and the momentum-building approach in our procrastination guide.
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This article is for informational purposes only and is not medical advice. See our Medical Disclaimer before changing your exercise, diet, or supplement routine.
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Frequently asked questions
Does habit stacking actually work?
Research on habit formation found that anchoring a new behavior to an already-established daily routine made it meaningfully easier to establish than tying it to an arbitrary time, supporting the core idea behind habit stacking.
Why does anchoring a habit to an existing routine work better than a time-based reminder?
An existing routine happens automatically and reliably without needing you to remember a clock, and finishing one habitual action naturally cues your brain to look for what comes next, both of which make the trigger more dependable than a time alone.
How many habits can you stack onto one routine at a time?
Keeping it to one or two new habits per existing anchor is generally recommended, since overloading a single cue with too many new behaviors makes each individual one less likely to actually stick.
What is a good example of habit stacking?
Attaching a small new habit directly after something you already do every day without fail, such as doing 10 push-ups right after pouring your morning coffee, or stretching right after brushing your teeth.
