Our willpower gets depleted over the course of the day. While food (specifically glucose) helps ensure we refuel on our willpower reserves, a good night’s sleep is the best way to recover from willpower depletion. So, if you’re either having a bad day or are just feeling exhausted after a day involving multiple decisions, go to bed.
Things seem to go from bad to worse by the evening as you get completely drained of your willpower resources and our natural instinct is to keep working at our to-do lists. Don’t. Sleep.
Things always look better in the morning. And, besides, those tasks that will take you 3 hours at night will probably be done within 30 minutes in the morning.
Pay attention to your willpower reserves. If there isn’t enough fuel in the tank, it isn’t possible to drive… let alone drive well and have some fun along the way.
A Learning a Day 