The founder and CEO of internet-retail behemoth Amazon got his start working the grill at McDonald's during his summers as a teenager, according to the book "Golden Opportunity: Remarkable Careers That Began at McDonald's."

"The most challenging thing was keeping everything going at the right pace during a rush," Bezos said. "The manager at my McDonald's was excellent. He had a lot of teenagers working for him, and he kept us focused even while we had fun."