Maybe you’ve seen Joy Mangano’s motivational business story on the big screen. After all, her life inspired the 2015 film “Joy,” not to mention she left her mark on the Home Shopping Network and QVC. Mangano’s creative inventions began when she was a teen, though her first hit was the best-seller Miracle Mop, which she developed more than a decade after earning a bachelor’s degree in business. She invested her life savings to develop the prototype, working out of her father’s auto body shop. In her first year, Mangano sold several thousand mops. Then she took to the television shopping network QVC. While the first airing of her product didn’t go well, she convinced the network to let her appear on the next show. That turned out to be a wild success, and more than 18,000 mops sold during her slot. Today, she holds more than 100 patents. She sold her company, Ingenious Designs, to the Home Shopping Network in 1999. Mangano is reported to have a net worth of $50 million. If You Lik...