If you would require a lifestyle change just because you realized you had a set amount of time left, maybe you weren't living right in the first place, before you knew how much time you had left? My opinion.
I try to live every day like it could be my last, I defiantly wouldn't be changing my life style at all, basically just clean up all my loose ends and then go explore, something I already do just to a slightly lesser degree because of responsibilities.
