<< I sleep through EVERY alarm. My clock radio, my cell phone, my pda, and my computer are currently staggered to wake me up in the morning. Somehow i tune them out and dont hear a damn thing. >>
Some common sense things are drinking caffienated beverages before bed, drinking alcohol before going to bed (it is a myth that alcohol makes you sleep 'better'), taking naps in the day (a short nap is fine, but no longer than 15 to 30 minutes), eating before you go to bed (while it may help you fall asleep, it can cause restless sleep, same as alcohol), staying up too late, not going to bed and waking as close to the same time every day as you can, substance abuse, etc.
General health concerns like eating well, drinking plenty of water, and working out can do wonders. Working out is the best stress reliever known and will make you ready to hit the sack.
After you've eliminated the common sense things, don't ignore or dismiss the possibility that you may have a real sleep disorder.