I'm not going to look it up now, but there was a post on lesswrong.com summarizing health things-to-do that had evidence behind them. IIRC it recommended for me

I'm not going to look it up now, but there was a post on lesswrong.com summarizing health things-to-do that had evidence behind them. IIRC it recommended for men (but not women) to donate blood every year or two.