These types of questions may be best addressed in one of the other forums such as the panic board or staying motivated board.
That being said, sleep issues vary widely and if this is a problem you have been eperiencing for quite some time you may want to talk with your doctor and see if he/she has any suggestions.
SparkPeople has an Official Better Sleep Challenge SparkTeam that you may want to check out, as well. (see link below).
I hope this helps!
Coach Nancy www.sparkpeople.com/myspark/challenge_deta