All the obvious stuff applies, re sleep hygiene etc. So when you are in bed you are there to sleep, not watch TV or play with a computer.
One thing that worked for me when I had a spell of waking at 3am and lying there for 3 hours, then falling asleep and waking up feeling buggered, was to get up at 3 and do something. You do this until you feel sleepy. For me it was ironing a few shirts, listening to a bit of music, tidyig the house. Next day I was in bits, but I slept like a baby thereafter. I think I maybe had to do it twice before the message got through.
One thing that worked for me when I had a spell of waking at 3am and lying there for 3 hours, then falling asleep and waking up feeling buggered, was to get up at 3 and do something. You do this until you feel sleepy. For me it was ironing a few shirts, listening to a bit of music, tidyig the house. Next day I was in bits, but I slept like a baby thereafter. I think I maybe had to do it twice before the message got through.