Check out this link about sleep: 

http://news.yahoo.com/s/time/20080610/hl_time/howmuchsleepdoyoureallyneed 

I’ve always felt that when it comes to sleep that you have o figure out what is best for you! Just pay really close attention to how long you sleep and how you feel each day. Some people may think that they need more, but they just might need less (i.e. my wife!). Jennie says that she needs about 8 to 9 a night, but when she gets that amount she’s incredibly tired!