It's funny, but sleeping problems are something that have never bothered me. I make a point to try and get in an hour of excersie everyday, so by the time it gets late at night my body is usually exhausted.

Have you tried going for a run during the day, or after work? Working out at the gym is great, but you should also try and get in arobic excercise, like running for over 15 minutes, not just anarobic exercise, such as lifting weights.