Warren Buffet, the second richest man in the world who has donated $31 billion to charity, advocates for a simple lifestyle. He still lives in the modest house he purchased over 50 years ago and drives his own car without security. Buffet meets with the CEOs of his 63 companies only through annual letters, setting clear goals and trusting them to do their jobs well. Though initially scheduled for only 30 minutes, Bill Gates' first meeting with Buffet lasted 10 hours, turning Gates into a devoted follower of Buffet's philosophy of value investing and living simply.