How did the self-made billionaires in these videos get their first big break?

The founders' early breaks were usually small, scrappy starts rather than a single lucky moment. Andy Frisella began with a small retail store funded by $12,000, and it took years before the business made real money. Sarah Blakeley started with $5,000 she had saved from selling fax machines door to door for seven years. Her first big opening came when she stocked her product in Neiman Marcus by placing bins at every cash register, and the store's CEO let her keep doing it once it started selling. Jim Koch of Samuel Adams got an early push from his uncle, who told him to land one customer every day and not come home until he had. Within six weeks of hitting the market, the beer was picked as the best beer in America. The Whoop founder pointed to a moment when LeBron James wore his product on television, at a time when only about a hundred straps existed, which gave him a second wind. The logistics founder took $68 and used it to buy equipment and build up his business.