Hot Tea

There is nothing as calming as a cup of hot tea right before bed.
If you are having difficulties in falling asleep give it a try.
If falling asleep isn't a problem then do it just for the contemplation time as I do.
You won't go wrong either way.
I would suggest an herbal variety, preferably non-caffeinated - unless you desire to get up after a couple of hours sleep to run to the toilet and disrupt that peaceful and serene feeling you had when you went to sleep.