Hmm, what works for me is having a phone by my side..
I really don't know if this will work..in fact, why do I even have a phone by my side?!!? Probably just in case if i get a really juicy gossip text!! LOL just kidding .
I also have an mp3 by me, so just turn it on and play some tunes before you sleep. but turn it off when you start to feel tired..