Sweetgreen: Nicolas Jammet and Jonathan Neman

In 1972, Maureen and Tony Wheeler bought a beat-up car and drove from London "as far east as we could go." They wound up in Australia, by way of Afghanistan, India and Thailand. Their notes on how to travel on a shoestring became a book, which grew into Lonely Planet — the largest travel guide publisher in the world. PLUS in our postscript "How You Built That," how 15-year-old Michael Mendicino, with help from his mom, took a teenage trend and turned it into a board game called Bottle Flip. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

8 Touko 201740min

As a kid, Troy Carter dreamed of being a rapper, but soon discovered he was a better manager than a musician. He took Lady Gaga from obscurity to stardom – helping shape both her music and her brand. Then he turned his gift for spotting talent to spotting investment opportunities with his company Atom Factory. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

1 Touko 201744min

Barbara Corcoran grew up in a working-class Irish Catholic family in Jersey – with nine brothers and sisters. But she used her charisma to conquer the streets of Manhattan and build the real estate company, The Corcoran Group. She then reinvented herself as a shark – on Shark Tank.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

24 Huhti 201750min

Brian Scudamore didn't dream of a life hauling away other people's trash. But when he needed to pay for college, he bought a $700 pickup truck, painted his phone number on the side, and started hauling. Now 1-800-GOT-JUNK? makes over $200 million in annual revenue. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

17 Huhti 201740min

App developer Apoorva Mehta almost gave up on being an entrepreneur until he figured out what he really wanted to do: find a hassle-free way to buy groceries. Five years after launch, the grocery delivery app Instacart is valued at $3 billion. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

10 Huhti 201739min

When Steve Case started out in the tech business in the mid-80s, the idea of the internet — as we think of it today — didn't exist. But with AOL, Case saw an opportunity to connect millions of people, through chat rooms, news updates, and the iconic greeting, "You've Got Mail." See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

3 Huhti 201732min

As a refugee growing up in Tel Aviv, Haim Saban remembers not having enough money to eat. As an adult, he hustled his way into the entertainment business, writing theme songs for classic cartoons like Inspector Gadget and Heathcliff. But producing the mega-hit Mighty Morphin Power Rangers put him on track to becoming a billionaire media titan. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

27 Maalis 201741min

Ever since she was a little girl playing dress-up in her aunt's closet, Kendra Scott loved fashion. Her first business was a hat shop, which she started at 19 – it failed. A few years later, she started a jewelry business out of her spare bedroom. Today the company is reportedly valued at more than a billion dollars. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

20 Maalis 201742min