> Everything.
Yeah as long as it doesn't require any effort.
Exercise every day, stop alcohol, stop smoking, start eating well. You might not live longer but you'll live in good health longer, which is all that matter in the end. I'd take living until 60 in full physical and mental shape over slowly rotting in a retirement home until 90.
If we truly cared about health we wouldn't accept ICE cars inside our cities, fast food, sodas, fat acceptance movements, &c. We're not killed by diseases anymore, we're killed by sloth and gluttony.