Caesura Letters today discusses the time it takes to form a new habit.

Habits are not the result of thinking about something hard enough to change it, but transforming your behaviour long enough that you stop thinking about it. Therefore, the best strategy is not to have a specific “timeline to habit achievement” at the forefront of your mind. Instead: just keep doing it until you don’t realize you are doing it anymore. Preoccupation with a deadline only gives you more reasons to think about it.

— 21 Days to Change a Habit? by Caesura Letters