Module 1 · Start here · Supported by multiple studies

How habits actually form

Repeat a small action in the same situation, and the situation slowly learns to start it.

5 min read · Level: Beginner · Free — no account needed to read

The problem it solves

What actually turns a new behaviour into a habit?

The concept

Habits form through three ingredients working together: a behaviour, a stable situation, and repetition. Each time you do the behaviour in that situation, the link between them strengthens a little.

Early on, doing it takes intention and effort. With enough repetitions in the same context, the effort drops and the situation starts to prompt the action on its own. Researchers call this growing sense of “it just happens” automaticity.

Rewards help too. Something good that follows the action — relief, satisfaction, a nice feeling — makes it more likely to be repeated, and repetition is what does the building.

Why it matters

This is the model behind almost every technique in Habit Lab. If a habit isn’t forming, one of the three ingredients is usually missing: the behaviour is too big, the situation keeps changing, or the repetitions aren’t happening.

Supported by multiple studies: Many studies, often pooled in reviews or meta-analyses, point the same way. It still works better for some people and situations than others.

See it happen

Kofi wants to drink a glass of water each morning. For two weeks he drinks it sometimes, whenever he feels thirsty.

The ordinary first approach

He is doing it quite often, so it should become a habit on its own soon.

With the idea

He fixes the situation — a glass by the kettle, filled while the kettle boils — and repeats it there every morning.

What changed

Same behaviour, but now tied to one stable moment, which is what lets repetition build the link.

Easy to get wrong

• Focusing only on motivation and ignoring the situation the habit happens in.
• Changing the time and place every day, which gives the link nothing stable to attach to.
• Stopping early because it “still feels like effort” — effort fading is the end of the process, not the start.

Try it now: Check the three ingredients

1. Name one habit you want to build.
2. Write the behaviour in one small, specific line.
3. Write the situation it will always happen in, and how many times this week you’ll repeat it there.

Apply it to one of your habits

For one of your habits, which of the three ingredients — behaviour, stable situation, repetition — is weakest right now?

Reflect

• Which ingredient do you tend to skip when starting something new?

Go deeper — evidence & sources

• Lally & Gardner (2013). Promoting habit formation. Health Psychology Review. doi:10.1080/17437199.2011.603640
• Gardner, Lally & Wardle (2012). Making health habitual: the psychology of ‘habit-formation’ and general practice. British Journal of General Practice. doi:10.3399/bjgp12X659466
• Wood & Rünger (2016). Psychology of Habit. Annual Review of Psychology. doi:10.1146/annurev-psych-122414-033417