I sleep easily, always have. That being said… I exercise daily, I eat well (limited fast food, moderate caffeine intake, lots of fiber, very little meat – basically follow the Canada Food Guide) and pay special attention to what’s going on before I sleep. I cut down the light, and stay away from electronics for the last half hour/hour before bed.
I’m pretty sure there is a video on the subject on here. I’d check it out if I were you. 