At 23 years old, Barbara Corcoran quit waitressing ―just one job of over 20 she had already held―and borrowed $1,000 from her boyfriend to start a tiny real estate company in New York City. Over the next 25 years, she would parlay that loan into a five-billion-dollar real estate business and the largest brand in the business. Best known for her role as a “Shark” on ABC’s hit show Shark Tank, Corcoran’s amazing story, professional expertise, and tell-it-like-it-is attitude is a refreshing approach to success for audiences everywhere. Here, she explains the difference between salespeople making $40,000 a year and those making $8 million a year: