Speaking of Sudoku.... I have no idea why but doing the puzzles gives me courage (like I'm not losing my touch intelligence-wise & I'm still here/still strong).
Getting back to the #s, what I do is I look at the them & try to see what I can see--patterns, what type of #s they are, etc. The good news is that it is a low-cost hobby!
It also reinforces my grade school math: palindrome #s, prime #s, algebraic expression (x+y) & so on.
Somehow, doing this makes me feel more confident & at peace. It hasn't hurt my head yet.
& the #s I am looking at are lottery #s (sheet ticket), although I don't think I could win. It's fun, though, looking at the 5 #s & trying to figure out the rules of the game.
Also, I doodle from time to time. I must make an avatar, so you see what I mean. Get ready! It might be a shocker, if I can think of a good one.