Kara Goldin is the founder and CEO of Hint, the company that is best known for making unsweetened flavor water.

But her path to creating a successful product wasn’t an easy one. She was turned down, discouraged, and outright rejected along the way. But she persisted in creating a successful company.

She’s now also a best-selling author. Her book, Undaunted, is a Wall Street Journal Bestseller. In it, she shares how she overcame people who doubted her as well as her own self-doubt.

Amy talks to Kara about how to overcome self-doubt, how to deal with other people who doubt you, and the one question you should ask yourself when you're afraid to do something.