Sleep requirements vary. Most of us need 7 to 8 hours of quality sleep every night. but we all know the person that only needs 5 or 6. What does your body need?
A good way to figure this out is on vacation. Next time you are away, (and not jet lagged), throw away the alarm clock, disconnect your cell phone, and draw down the blinds. Note the time you drop off to sleep and stay asleep as long as you want. Do this for at least 3 days. Not only will you look and feel great, by the end of the third day you’ll have a very reliable idea of just how many hours your body needs to sleep.
Now the hard part will be making sure you get it.