I have chronic insomnia caused by that accident I was telling you about, SwitSof. While I was in the hospital, they tried different things with me...pills, relaxation exercises, etc. Finally, they found one thing that worked but it was very specific. They gave me a tape of visualization scenes to use, The first two did absolutely nothing for me but the third one was the key. It involved a cottage at a remote lake...no one around...me on the dock (I added my first dog into the picture)...going into the cottage...taking in the surroundings...touching the couch and feeling its texture...yada, yada. Knocked me out every time. Never ever made it to the 4th scene.
Anyway, they had scenes such as looking at the stars, clouds and so on.
You could always make up your own. Visualize a place that you would find totally relaxing...take in all of the scenery...feel what you see...if you are on the beach, how does the sand feel? Is it hot? What does it look like? White like a freshly washed sheet?
I wish you luck...not being able to sleep is horrible, especially when you start thinking about it.