Derek Sivers founded CD Baby, an online seller of independent music, in 1998 to help fellow musicians sell their music. He sold the business for $22 million in 2008, then began traveling the world and blogging on creativity and entrepreneurship.

Peter Thiel, an American entrepreneur and investor who co-founded PayPal and Palantir, and who was the first outside investor in Facebook, taught a class on startups at Stanford University in the Spring of 2012.

You should only take advice on getting rich from rich people. Felix Dennis (1947-2014), the founder of men’s magazine Maxim and the publisher of over 50 magazines such as The Week and Auto Express, meets that standard.