Usual stuff:
Exercise
Eat healthily
Drink water
Sleep
Trimmed haircut and beard (and tame the eyebrows!).
Only worry about the sheet you control.
I used to do a lot of cross-country cycling and play footy (soccer), but nowadays rather preserve my joints and now I just do walking and calisthenics/resistance training with some weights.
Prepare/cook 90% of my food. I am a bit sad though as I'll eat the same meals every day for weeks -- but that does mean I can batch cook and not worry about it, just reheat and done.
Care less will help keep you youthful, and of sound mind - to include: I don't own a TV (not that that is saying much), I don't follow the media, I don't follow social (I do like a bit of youtube, though). Keep things simple.
I know, I know. I sound really fun!