I’ll never stop trying out new ideas—that’s how I invented the Cronut. But I learned early that you should use an idea when you come up with it. When I started in a professional kitchen at age 16, I worked 16-hour days for $25 a week. I finally saved up enough money to buy a new shirt but kept it in its package for over a year. By the time I put it on, the shirt no longer fit me. New ideas drive creativity but don’t keep a good idea under cover.