How to not Procrastinate and concentrate more?

Im just a average middle schooler who doesn't like to do hw and spends most of my time playing outside or on the computer. I really want to stop procrastinating but things like Facebook and Aim tempt me. Most times i do hw on the computer i last until like 2Am. I want to finish faster so i cud sleep. Im not good at making habits o-o also im not in pressure its just that i don't want to do the hw and im tired. Well plz help me find a way o____O. I want to sleep =P (im procrastinating now, suppose to be finishing hw o-o;;)