problems of going to sleep

I have problems in going to sleep every day.I lie in bed for several hours rolling over and over before going to sleep.Even though I sleep it is not a deep one.I dream a lot and feel tired when I woke up.Once wake up it is hard to do to sleep again.So every night I sleep only two or three hours.I feel woozy in the day.I tried every means but without help.I count sheep,I read books I listen to the radio before sleeping.It is hard for me to go to sleep.Have you any idaes to help me,please!