I read an article recently by a doctor (as shown in Men's Health) who advocated making the room dark. Pitch black. Especially no blue light of any kind. And then, just sit there.
Think and daydream if this relaxes you, or clear your mind for a long time and just count forwards and backwards to 100. First in english, then in french, spanish... This should be done if it's relaxing to you. Like counting sheep.
Sit there for two hours. Every night. Sooner or later your mind will get it.
When you wake up in the middle of the night, tell yourself it's still bedtime, and attempt to go back to sleep.
The underlying issues should be considered. Just acknowledging your cause might give you some relief.
Avoid anything remotely stimulating before bed, no chemicals, no movies or car racing.
I'm hoping this helps. Try each person's suggestions for a week, and see what works for you.