See a primary doctor and a dentist at least once a year. Drink less booze and coffee, drink more water. Stretch and exercise when ya can. Everyone here pretty much nailed it. But, also, make sure you have a hobby. Something to keep the mind healthy too. I like putting together gunpla models. It’s relaxing and keeps my brain sharp (well, sharp is a strong word, but you get it). Finally, you’re gonna go to a lot more funerals than weddings now, so reach out to people you haven’t talked to in a while just to say what’s up.