Kimbal Musk

I did a business in a box called College Pro Painters. They taught you how to paint houses, how to hire and fire, how to sell, how to deal with customers. You got a one-year franchise. It was the hardest year of my life in terms of hard work. I won manager of the year. It was very successful.

At one point, my house was a school for autistic children. I opened up my doors to about 30 kids and their families at the time. I was turning into Mary Poppins because I had to do something for these kids who have nowhere to go. So my house was the school for two years.

The thing about dancing - what it taught me all those years - is it gives you an amazing sense of discipline in forcing yourself to do things that you know are good for you but you don't really want to do.