Try Zzzquil or one tablet of Benadryl around 30-45 minutes before the time you wish to sleep each and every night! That'll help your brain build a sleeping schedule, and eventually it'll come to where you won't need those at all, and eventually your mind will begin associating that time of the evening with sleep, and will automatically start going into the first phase of drowsiness. .u.
Also two slices of white bread (plain, with water) and crabs for dinner help you sleep, too. The carbs activate the sleeping chemicals in your brain and make them last longer, so you get more sleep. But no protein past 5 PM! That'll just keep you awake. Protein is an energizing chemical. :c