This is where my “Fall asleep listening to an audiobook” strategy works pretty well. I can drift off to a good even-tempered reader (those old Brits do a good job).
I set the timer on my iPhone to stop playing in 20 or 30 minutes, and then if … ok, WHEN… I wake up in the middle of the night, I can put on the 'book again.
I’ll usually fall asleep again, but I don’t, or if that takes hours, then hey, at least I’ve been laying still and listening to a good book (That gets rid of most of that “I’ve GOT to get back to sleep!” stress).