If you have ruthlessly prioritized, and time-blocked for, an important planning session, but come to the meeting depleted of energy and off your game - you are certainly not setting yourself, team or company up for success.

If you don’t control your calendar, it will control you. And you will spend the majority of your time on defense, reacting to whatever you get hit with when you check your phone or walk into work in the morning - meetings, fire drills, people issues, investor requests, etc.