I’m one of those types who can create pretty vivid internal images, especially when I concentrate.

If you can do the same thing, try combining the list making with a visual aspect. I literally just count numbers in my head, but at the same time I imagine what each number would look like in a fancy typeface, but as if it were a 3D object floating in blank ”mind space.”

It takes up almost all of the capacity for my mind to wander, and unless I’m having a particularly difficult time I can usually use this to fall asleep within a half an hour or so.

Doesn’t help with staying asleep, though.