Automaticity Threshold
Habits reach automaticity after a median of about 66 days of daily repetition in a stable context, with a range from 18 to 254 days; missing a single day does little harm.
An everyday example
A daily budget check feels effortful for weeks and then one morning you notice you did it without deciding to.
What it can cost you
Quitting a good routine at week three because it still takes effort, or assuming a bad one is 'just a phase' when it has already automated.
Warning signs
- I gave up because it did not feel natural yet.
- I assumed a two-month pattern would fade on its own.
One thing to do
Plan for ten weeks, not three; track repetitions, not motivation; and treat any behaviour you have repeated daily for two months as a habit that needs a real intervention to change.
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