If you want a natural remedy, try Melatonin, 5mgs. It's what the body manufactures to make you go to sleep, but sometimes it falls down on the job. Should be available from health food stores.
Strangely, it isn't available here in Ireland - they only let you get it on prescription, but I get mine online through ebay from the UK.
I also read, turn on the TV, or come here.