Do you know there is one thing many top achievers have in common? Yes, they are all insomniacs, weird but too. One may wonder, what does sleep have to do with success. Yes, sleep and success are related to an extent. While some feel that a proper rest soothes your mind and a cool mind performs better. But another set of achievers feel just the opposite. They actually don't get enough time to sleep, they run short of time and this then becomes their life style. There are interesting personalities who have very less sleep, maybe just 50% of what is required. Our PM Narendra Modi is an early riser as he an avid Yoga lover. He does not sleep for more than three -four hours. Same way Shah Rukh Khan also does not sleep for more than four hours. Pepsi CEO Indra Nooyi does not sleep is an early riser. She gets up around 4 AM. Cisco CTO Padmasree Warrior is also an early riser who gets up around same time. The new flavour of United States, who is also a candidate for US presidential post is also an early riser. He does not sleep for more than four hours. Twitter founder Jack Dorsey also does not sleep for more than five hours. Apple CEO Tim Cook also is an early riser who gets up at 4.30 AM.