I'm a billionaire hair care and tequila founder. I don't have an email address and am motivated by peace and love — here's my routine.

John Paul DeJoria. Courtesy of John Paul DeJoria This is an as-told-to essay based on a conversation with John Paul DeJoria, an 82-year-old self-made billionaire and philanthropist based in Austin. This story has been edited for length and clarity. When I started John Paul Mitchell Systems in 1980, I was 35 and living in my car in LA. Inflation and unemployment were high, loans were difficult to get, and we waited in line to buy gasoline. Everyone said, "You can't start a business with no mo...