Insomnia Support Group
Insomnia is a symptom, rather than a disease, and is characterized by inadequate quantity or quality of sleep. People with insomnia complain of difficulty falling or staying asleep, which results in significant impairment of daytime functioning. Insomnia is categorized as transient (shorter than one week), short-term (one to three weeks) or chronic (longer than three...

Have you tried to do anything specifically to help you relax before bed? Some people find Progressive Muscle Relaxation helpful for both stress relief and insomnia....here's a link with an overview on the technique.
http://www.medicinenet.com/script/main/art.asp?articlekey=47281
Wishing you all the best :)
Learning about stress management can help, as can the relaxation exercises in bed sonny mentions. You can also plan a 30-60 minute pre-bed relaxing routine, that also helps many people.