I think that age as a number is not nearly as important as health. You can be in poor health and be pretty miserable at 40 or 50. If you're in good health, you can enjoy things into your 80s.
I'm very much a creative person, but you've got to do the follow-through. A lot of people start out with an exciting thing and they want to take over the world, but really the people who do take over the world have a good plan of how to get there and the steps along the way.

