M.L.
Lock your door, or institute the bedroll rule. "You can come in here, but you have to bring your blanket and pillow and make a pad and sleep on the floor."
Oh yeah, not hating on Tracy. Melatonin is natural, safe and works, though I would only use it in extreme circumstances. Why do I always forget to by it?
I have to lock my boys in their room to get them to stay in bed. But for safety and potty issues, I unlock their door before I go to sleep too.