Waking up at 3 am is not an unhealthy habit. It doesn’t matter at what time you wake up after sleep. What actually matters is you should get the right amount of sleep according to your mind and the body's needs. There are lots of people who are successful and wake up early. Richard Branson (Chairman of Virgin Group). 5 am Tim Cook (CEO of Apple). 3:45 am Bob Iger (CEO of Disney). 4:30 am