I used to have no problem sleeping. I once fell asleep standing up against the door in the New York City subway.

But I was very young.
Now I’m old and have much more trouble sleeping. I usually fall asleep fairly easily, then wake up two hours later. Sometimes I get back to sleep, often I can’t. Plus, There’s always at least one or two trips to the bathroom to break it up and make it more troublesome.
Finally, I have worried for years about cognitive impairment so I work hard to keep my brain as active as I can. Unfortunately, at 3 o’clock in the morning, my monkey mind can start working overtime and I come up with 16 projects I wanna work on. if I had any brains, I get out of bed and write it all down, but I’m too lazy and tired and so I don’t and so I just lay there and go over it and over it and hope I fall asleep.
The only thing that works for me frankly is a meditative kind of thing. Repeating one word endlessly like “om ” or “one” or whatever else, in addition to focusing intently on my breathing. The combination of the two—if I force myself just to do that and block out any extraneous thoughts—usually puts me to sleep in 10 or 15 minutes. It was never this hard before, but I was never this age before. Lol