I am a man and my mother always told me not to stuff my pants pockets full becasue it makes me look fatter: wider hips. Her recommended solution was, somewhat ironically, a cowboyish man-purse. That may be the reason: women may care more about not looking fatter than men.
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.