Repositories are awesome, and we should have more of them.
I recently completed BJ Fogg's Tiny Habits, and it's a pretty lightweight way to install new habits (recommended). However, I realized I could use a better repository of useful habits.
So, please use this thread to suggest habits that you've found useful. Bonus points for evidence/anecdata of usefulness.
Obviously, 1 habit per comment makes upvotes a clearer signal of collective approval.
Pocketbooks* and backpacks are likely to have pockets. I use clothing pockets myself, but making better use of pockets in pocketbooks and backpacks might also be a useful habit.
*Wikipedia has it that pocketbook is an American (regional?) term for handbag, and it's certainly the word I would use if I were talking. I take purse to refer to a small wallet which is just a single compartment with a clasp on top. I would distinguish between a hand bag and a shoulder bag. I don't think I've seen pocketbook in print-- to the point where it looks like it could be confused with a paperback book.
Thank you for the clarification - I'm from Australia, and if I'd guessed I would have assumed a pocketbook was just a fancy notebook (like a moleskine or something).