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.
Load up tasks that can't be interrupted, or must be finished, as early in the day as reasonable. By the end of the day you want to only have things left to do that you can easily stop and leave when you should be heading to bed, to ensure you go to bed on time. Also try to avoid starting anything that will be exciting or stimulating too late in the day. For example, reading the latest HPMoR can be stopped at any time, but if you know you'll get into it and not want to stop reading, then don't start it until you have a sufficient block of time earlier in the day free.
Really? I've had the opposite experience!