Sara Blakely

"My dad encouraged us to fail. Growing up, he would ask us what we failed at that week. If we didn't have something, he would be disappointed. It changed my mindset at an early age that failure is not the outcome, failure is not trying. Don't be afraid to fail."

"I think failure is nothing more than life's way of nudging you that you are off course. My attitude to failure is not attached to outcome, but in not trying. It is liberating. Most people attach failure to something not working out or how people perceive you. This way, it is about answering to yourself."

"I failed the LSAT. Basically, if I had not failed, I'd have been a lawyer and there would be no Spanx. I think failure is nothing more than life's way of nudging you that you are off course. My attitude to failure is not attached to outcome, but in not trying. It is liberating."

"Don't solicit feedback on your product, idea or your business just for validation purposes. You want to tell the people who can help move your idea forward, but if you're just looking to your friend, co-worker, husband or wife for validation, be careful. It can stop a lot of multimillion-dollar ideas in their tracks in the beginning."

"I'd get kicked out of buildings all day long, people would rip up my business card in my face. It's a humbling business to be in. But I knew I could sell and I knew I wanted to sell something I had created. I cut the feet out of those pantyhose and I knew I was on to something. This was it."

"My revenue was $4 million my first year in business, off of one $20 item."