Ensure that you do things differently from everyone else

When I was a child, my father used to encourage my brother and me to fail. At the dinner table, instead of asking about the best part of our day, he would ask us what we failed at that week. If we didn't have something to tell him, he would be disappointed. When we shared whatever failure we'd endured, he'd high-five us and say, 'Way to go!' The gift my father gave us by doing this was redefining what failure truly meant.

I started thinking about joy. Everything in our society is so purposeful. Let's bring joy back to the experience.

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.

The thought of my mortality - I think about it a lot. I find it motivating. It can be any time that your number's up.

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.

I didn't want women to walk out of the dressing rooms feeling depressed and wanting a cocktail.