Coming home after work to a frenetic family household can be risky, too. If you’ve ever walked in the door and snapped at your family because the toys are on the floor, or the den is a mess, or the dog needs walking—the triggering irritant is irrelevant—you know depletion’s power. You had the option of being happy to see your family or making everyone miserable. Running low on willpower, you made the wrong choice.