read books which are so boring , don't think of something or someone else too much when u go to bed his feelings will not let u sleep for whole day, drink lot of water before u sleep, it will be better if u sleep without watching TV or any thing else.
If you are not bipolar, there shouldn't be a problem learning to sleep at night. Get rid of all distractions, meditate for about 15 minutes before getting into bed, avoid caffeinated drinks, water, and try to exercise before sleeping. You have to get yourself into the habit and as such, you have to teach yourself to sleep at just about the same time every night. Read on from sleepcottage.com/how-to-fall-asleep-fast/.