L. ~
I agree with what the other mom's have adivised so far.
* Definitely monitor caffine and sugar intake, not only before bed, but throughout the day.
* Try to eliminate meals and snacks by 2 hours before bed time. 3 hours is best, but that can be tough. Try to offer only water after this time.
* Limit evening activity. No TV, video games, rough-housing/wrestling with siblings, etc. at least 1 hour before bed time, 2 if possible. Even be sure homework is finished by this time during school months. During that time, suggest something relaxing such as reading a book/magazine/comic book, play a mellow board or card game as a family, etc.
* Try a warm shower or bath each night before bed.
* Try to eliminate TV's, video games, toys, and general distractions from his room.
* In the morning, try getting him up an hour earlier. This will give him time to wake up before needing to be truly alert, and also make him more tired in the evenings. Don't let him sleep in too long in the summer months when there's no school or he will stay up later and later.
* Start the morning with a shower and breakfast before anything else. If he showered the night before, then just have him wash his face and brush his teeth.
But above all else, make certain there are no life changes or stress factors causing the problem. No family issues/arguements, recent moves or job/schedule changes, being picked on or bullied by siblings or friends, etc. Also, be sure he's not afraid in his room at night. He may be ashamed to admit it since he as an older brother, so try to talk about it in private. If so, offer a nightlight or allow him to keep a flashlight by his bed.
Also, some kids need more than 8 hours of sleep to be fully rested. I've read as much as 10-12 hours for some kids depending on activity level, growth spurts, health, etc. This may be why he's still so tired in the morning.
Hope some of this helps. Best of luck to you and your family.
~ V.