If you are having significant mental stress about something during sleep time, get up and write it out. Purge stress from your body and mind, do not let yourself ruminate. Learn to disconnect your intellect during the day by taking breaks. To help reduce chronic muscle tension, learn daily stretching exercises like yoga or tai chi. Your subconscious controls your sleep patterns and has a memory for virtually everything you do, and that includes a memory for nice, deep, restful sleep.
Hypnosis is indeed very relaxing, making sleep come easier and has no harmful side-effects.
Several months ago I ordered a tape for relaxation. I am very impressed. I listen to it every night. I have never had such an easy time falling asleep. Since working with you, my nights have been full of restful sleep.