ok, i haven´t read the other posts but:

You can try to be praying to God as you go to sleep, knowing that He is there along with you.
Also trying to listen or think of some relaxing songs or hymns.
You could try to read in bed until your eyes just close by themselves.

Another tip is that you should think of other things, try not to get stressed by the thought that you can´t sleep just try to "rest for a while".