In addition to a cool/cold bedroom, & covering up the clock so you can't see the time, Dr. Oz recommends removing
all electronics (phone, iPad,etc) and sleeping in a
totally dark bedroom; he even recommends black sheets! It's a scientific thing based on the effect of light on your brain. If your brain perceives light, it will put out some chemical to keep you awake. Before buying a set of black sheets, it might be worth trying one of those eye masks that the airlines give away?
PS: HoneyBoy was bothered with restless legs, expecially after flying, and I bought him some magnesium supplements at Walgreens, and they work great! On the other hand, according to the folks on this forum, it's not the right kind of magnesium. lol It just says Magnesium 250 mg on the label, and the ingredients list says magnesium oxide (rust?) and magnesium stearate. I hope I'm not killing him with the wrong kind of magnesium, but it sure helps him sleep.