Scientists found that good sleep prevents hypertension ► http://healthland.time.com/2011/08/30/could-lack-of-deep-sleep-fuel-high-blood-pressure/, diabetes ► http://www.sciencedaily.com/releases/2012/09/120929140234.htm, weak immune system ► http://www.sciencedaily.com/releases/2012/07/120701191638.htm and other health problems. During sleep the body does a lot of self-repair.
Many want to live for centuries:), as Google Director of Engineering Ray Kurzweil explains in one of the videos at ► https://plus.google.com/+AlexP/posts/URSW7eeNhhf. However, to live long we need to sleep well, until we discover those longevity technologies. :)
Let's sleep better and meditate or relax more, since too much ambition can affect our health in negative ways. :)