Luckily I can sleep anywhere and everywhere. Basically I've learned to grab every minute of sleep while I was in the military. Also I've slept through while people where having parties on and around me and while there was a fire in the apartment next to mine (not a big one though, but a lot of noise from the fire squad as neighbors told me later).

So I really don't have any advice, but there are two (okay three) rules I always try to follow:
1. I listen to my body and try to sleep when I'm tired. Even if it's for just half an hour during the day, but especially in the evening when I sense I'm getting tired. It usually comes in waves so if you stay up when you feel tired, after a while you won't feel so tired anymore and then it becomes hard to fall asleep.
2. My bed is for sleeping. Actually when I lie down it tells my body that it's time to sleep. Being upright means activity, lying down means rest. I don't read, watch tv, think about things that go around in my mind, sunbathe, etc. whilst lying down. Okay, on the odd ocasion I do have sex in a horizontal position, but nowadays that's rarely enough to give my body any funny ideas.
3. Usually I have good wank before I go to bed.