Articles
Habits, with sources.
What the studies say about building habits — and what they don’t. Every article cites the research it uses.
Habit science
How long does it take to form a habit? Read the curve, not the deadline
The 21-day rule came from a 1960 book about self-image. Here is what the habit curve looks like week by week, and how to read your own.
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Streaks
Missed a day? What a broken streak really does to your habit
One missed day barely touches a habit. The broken streak is what makes people quit, and the research on streaks shows which designs help you come back.
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Self-monitoring
Does habit tracking work? What 138 studies say, and when to stop
The best evidence on self-monitoring, what it can and can’t do, and how to track a habit without turning it into a second job.
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Planning
Implementation intentions: how to write if-then plans that actually work
What the research on implementation intentions really shows, how to word an if-then plan, and examples for exercise, food, work, sleep and bad days.
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Habit science
Is there a best time of day to build a habit?
Morning or evening? One small study favours mornings. The bigger lesson from habit research is about consistency and anchors.
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Privacy
How private is your habit tracker? What to check before you log your life
Habit logs are health data in disguise. A ten-minute checklist for any tracker, and the honest trade-offs of on-device storage.
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