I would say where I feel like I'm struggling the most in learning and giving myself permission to fail is in finding the balance in life. There are different aspects to women: there's the mother, there's the working woman, there's the wife, the friend, the sister, the daughter and so just figuring that all out. I continue to want to try new things and give myself permission to not be great at it.

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

When I'm bored or tired of being blonde, I'll throw on a wig. It's a lot less of a permanent way to change your look, and I have about 10 - all different colors, shapes, bobs, long hair, short, feathered.

I'll mix a lot of things. I'll wear a Temperley dress with flip flops, or I might be in head-to-toe Gucci and have on a ring that I got from a gumball machine for 50 cents.

I'd never worked in fashion or retail. I just needed an undergarment that didn't exist.

Ensure that you do things differently from everyone else

Everything about my journey to get Spanx off the ground entailed me having to be a salesperson - from going to the hosiery mills to get a prototype made to calling Saks Fifth Avenue and Neiman Marcus. I had to position myself to get five minutes in the door with buyers.