I'm not a CEO, but I keep a similar schedule (replace his meetings and schedule reviews with development), and it works well for me. I'm up early, work for ~90

I'm not a CEO, but I keep a similar schedule (replace his meetings and schedule reviews with development), and it works well for me. I'm up early, work for ~90 minutes, then get the kids up and ready for the day. Same thing in the evening--unless something is truly on fire, I leave the office between 4:30 and 5:00 every day (or close the computer if I'm working from home), spend time with my family 'til 8:00 or 9:00, then work again for an hour or two (if necessary--I don't do this every night). Obviously, this doesn't work for everyone who works for someone else. I'm fortunate to have a job with a great deal of flexibility. If I'm in the office, I'm rarely there longer than 7-8 hours a day.