I hate to be a party pooper, but I just don’t believe it takes 21 days to create a habit. Or 30 days. Or however long people are saying. It’s true that you can’t simply do something for only 3 days, or 10, and expect it to “stick”. And the effort required to create a new habit is well worth it! But I think there are too many factors to pin it down to a specific number of days for all habits and all people.