I spent my entire life not sleeping, fearing sleep, and startling awake at EVERY sound (even the carpet fibers moving) until I upped my physical activity...I am almost 40 and just started sleeping 3 months ago...finally. I find that getting up at 6am everyday and going for a strenuous 5-6 mile hike, makes it so I literally pass out when I hit the bed at night. I know not everyone has the ability or time to do this though, I just found it helped me tremendously!