*Try to have a wind down ritual. For example, half an hour before you go to sleep, shut off TV, have a cup of herbal tea, and try to do something that is pleasant and relaxing and not stressful, even a light meditation to clear your mind. Play some soft music.
*Try to go to bed at the same time every night
*Consider using Valerian root (natural sleeping aid)
*Having a regular exercise routine helps, and you'll feel more naturally tired at the end of the day