I regularly have what I call 'non-sleeping' nights. Generally I put on my 'cozy-phones'
and listen to a talking book, or the radio. This hasn't been working recently - I blame my choice of books. I set the sleep timer for 30 minutes, and then, because the story is holding my attention, set it for another 30, and maybe even another 30... I was listening to 'The October Man', a Rivers of London book by Ben Aaronvitch, and now I'm three-quarters of the was through 'The Lighthouse' by P D James.
I need to choose something more soporific...
I have tried various breathing methods; in for a count of four, hold for a count of 4, out for a count of four, wait for a count of four... I manage one, maybe two 'circuits' and then I need to do some ordinary breathing again. Or in for four, hold for seven, out for eight and repeat... nope. I can't keep this going without running out of breath.
Last night I tried the US Airforce pilot training method and it worked! I read about it on the internet, and managed to find it in this article along with a whole load of other ideas.
1 relax your face, mouth, eyes
2 relax your chest, arms, hands
3 relax your legs, feet
4 Clear your mind, and imagine a relaxing scene. A couple of suggestions are 'lying in a canoe, looking up at a completely clear blue sky', or lying in a black velvet hammock in a pitch back room'
5 If this doesn't work, say 'don't think, don't think' over and over to yourself.
This should work within 10 seconds (or so!)
Whether it will work two nights in a row is another matter.