I don't know if this would help you, but in the late 90's when my parents were elderly and ill, I woke up in the middle of the night every night. I went to the computer and played solitaire until my eyes were so heavy they were ready to close. Then when I went back to sleep I slept until morning.
Another thing I used to do is buy or download hypnosis or relaxation mp3's and listen to them. The soothing voice and music used to lull me to sleep. I have them on my smart phone now. Or an mp3 with ocean sounds or peaceful music would work too.
If you like the smell of lavendar it's also very good for relaxation.
A hot bath with lavendar oil is a good bet. Don't use peppermint or any citrus - it wakes you up.
I don't know what meds you're on, and you should always check with your pharmacist first but I found gravol or benedryl would also put me to sleep. Check with your pharmacist first always - I can't take either med anymore.
Reading in bed didn't work for me - I'd still be reading when the sun came up. But maybe if you read something really boring it might help.
Drinking warm milk helped - I don't like the taste so I always added some vanilla extract.
I spent most of my life being an insomniac - I have lots of tricks.