I learned a similar concept in a drivers ed course many moons ago. The only space around your car that you have any control is in front of you. Granted you don'

I learned a similar concept in a drivers ed course many moons ago. The only space around your car that you have any control is in front of you. Granted you don't have complete control, but your decisions do impact how close people are to your front more often than the other sides. And what you're describing for time management is similar. You have influence over how much space you leave between you and the things in front of you on your calendar, but you'll never have much control over the end of the day, and how exhausted the final events of the day end up making you feel.