In order for me to actually go to sleep earlier, I have to deprive myself of sleep the night before so I actually feel tired, otherwise I toss and turn for hours. And that's just not fun.
I usually have to have the TV on if I'm sleeping at home, but anywhere else I usually read or play DS until I'm tired enough to fall asleep. (DS was GBA, GB in generations past) Writing also helps if I can't sleep due to brainstorming.