<p>Hey I wish you the best, just remember, physical activity is important. Working out your body helps the mind, and this have been proven from many "Ivy-League" researches. If you can operate on 3 hours of sleep, props to you. Just make sure you see your doctor regularly, every 6 months or so to make sure that your body isn't going to conk out on you. I understand you gotta do what you gotta do to succeed. So don't spend too much time TALKING about these study habits you are going to make. Plan them and get excited about your learning--It seems as if you already are. If you don't play a sport already, consider at least running a couple times a week or swimming laps every other day if that is better than running to you. You have to work out your body! To me there are three points of life that make an individual: the mind, the body, and the spirit/heart. The mind would obviously be academics, studies, and education. The body is the physical shape you are in, and the spirit/heart is obviously your spirituality and morals. It seems like you have this under control, and by no means do I mean to under-estimate you. I just want you to remember that developing the body will help develop the mind, and 15 is a critical age in the human body process. Keep it up, bud.</p>