I agree with the others. Feeling tired during the day when you get a good night's sleep (generally defined as 7-9 hours for an adult) is NOT normal. Apart from a doctor's visit, I'd suggest cutting out all caffeine - this includes coffee (even decaf), soda, teas that aren't listed as decaf, chocolate, caffeine pills, energy drinks - for a while. Also, get more exercise! Yoga is excellent for sleep troubles. A word of caution though: If you exercise within 3 hours before bed, you'll generally have sleep troubles. Get in your exercise early!