I like Alex Broom's suggestions for relaxing when you can't sleep.
I am amazingly better recently for sleeping more soundly and not waking up in the middle of the night.
If I do, I am getting much better at falling back to sleep by deep breathing. Within a few minutes, I'm asleep again.
If deep breathing alone doesn't get me to sleep or back to sleep, I do deep breathing while counting from 100 to 1
backwards, or even just from 50 to 1 backwards. It keeps my mind focused on counting and not worrying,
and worrying is a main cause of sleeplessness.
I also avoid watching television or being on the computer at least an hour before bedtime.
The bright light of a TV screen or monitor is enough to keep us awake before bedtime.
I often watch one of the Youtube videos on sleep and relaxation about an hour before bedtime.
It puts me in a calming mood.
A relaxing mantra also can be helpful... "I feel sleepy now. I am going to sleep now."