10. Ben Silbermann

Founder, Pinterest

"I think anyone who makes products has this simultaneous joy and, almost, shame looking at it. You look at it all day and all you can see is all these things you want to make better."

11. Set Godin

Author and Entrepreneur

"Where do you put the fear when you choose to innovate? The fear is there, but you have to find a place to put it."

12. Clayton Christensen

Professor, Harvard Business School

"Innovation almost always is not successful the first time out. You try something and it doesn't work and it takes confidence to say we haven't failed yet. … Ultimately you become commercially successful."