I also have a lot of trouble sleeping, it sucks because I end up going to sleep at 1AM and waking up at 6:30AM for school so I only get about 5 hours of sleep which is barely enough but I get tired throughout the day. What I've found that works for me is close your eyes with the lights off and everything and just think of something in your life or create a story eventually you'll start to get into hypnagogic state with auditory hallucinations which get you even more into what you were thinking about and soon you'll forget you were trying to go to sleep.