My child has a specific car toy that always stays in the car. Whenever I leave the car for any reason and regardless of what I remember about who is where, I must check to make sure that toy is in the car seat.
This started after my wife read me an article about babies being left in cars and scared the shit out of us that it wasn't crackeads to whom it happened but parents who thought they were sane and responsible just like us.
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.