Intellegent. Your problem may be with your “quality” of sleep, rather than “quantity”. Good healthy sleepers need very few hours as they reach the adequate level of REM during sleep.
I am not a sleep expert, but I also have a tendency to wake up extremely tired and I developed some helpful techniques for myself which may help you as well.
Here are some ideas:
* Exercise for 15 minutes every day. Break out in a sweat. Anything less than that and you’re not really exercising. Do not exercise within 3 hours of going to sleep;
* Do not eat anything sweet after dinner. No candies, no apples.
* Make sure your bed is solid. No squeaking and banging against the wall. Otherwise, when you turn in the middle of your sleep, you wake up for a split moment from the ruckus you make;
* Try very hard to keep to a rigid sleep schedule. Even on Shabbos and Sunday. Go to sleep and wake up at approximately the same time every day;
* Do not take a nap Shabbos afternoon for longer than 1/2 hour – and never late in the afternoon. Be up and about by 2:00 – 2:30;
* Room should be dark and cool. Your A/C should work 365 days a year. Put it on fan or low cool;
* Soft white noise. A/C will accomplish this;
* Do not listen to loud music before going to sleep;
I hope that some or all of the above will help you too. Good luck.