I consider advice in the context of "hope for the best, but plan for the worse." I would like to have the health of a 20-something in a hundred years from now

I consider advice in the context of "hope for the best, but plan for the worse." I would like to have the health of a 20-something in a hundred years from now thanks to some wonder pill but just in case I'm going make sure my lifestyle supports a long, happy life with the current constraints.