Getting up early is a no brainer for most executives.
It means being awake during a part of the day when there are few distractions. It means reacting to the biggest news of the day while others are dreaming. And in the evening you have the option to work late too -- or to get to sleep early while others are partying and watching TV.
From Jack Dorsey to Indra Nooyi, this is habit is common to tons of famous leaders.