Aw, Phred, I am sorry to hear you still have the old can't-sleep problem. I know how bad that feels.
I have some ideas, suggestions, or whatever you want to call them .. even silly maybe, but here goes.

All those things are sedantary I know, but rest is what you need and they do/can occupy the mind, which may help.
If you like reading have plenty of books on hand, maybe that looong one you have always been meaning to get to.
If you don't like to read I do know you like to write, get all those wonderful 'tails' you have told us together into some sort of framework for a book ... you have a ready market right here on PT.
Get some films you've been meaning to watch, sit and enjoy.

Of course fresh air is important too, I know, but you can get that by sitting out on the porch - maybe throwing the ball for the furkids - and taking gentle strolls.
Instead of trying to get to sleep at normal times just nap when you can.

That's about all I can come up with right now, sorry if they sound daft but...

{{hugs}}
Chris