Nick Friedman has made millions on what he says has been done since the Stone Age: hauling junk.

When he was 22 years old, Friedman and his schoolmate, Omar Soliman, became the youngest franchisors in the U.S. by starting College Hunks Hauling Junk. In six years, the national hauling and moving company has expanded to 35 franchises and more than 200 people.

"We took a very simple concept that’s already been done, put a very catchy angle on it and a big emphasis on customer experience," Friedman, now 30, told us. "It had a bit of sizzle with the name and the colors."

After graduating from Pomona College, Friedman started working at a Washington, D.C. consulting firm that he had built up his resume for, all the while feeling "very disillusioned with life after college." He always thought about his job the summer before, when he and Soliman "were literally hauling junk in a cargo van making money."

Friedman then decided to abandon his cubicle and invest all his time in College Hunks Hauling Junk. He's since been named one of the top 30 under 30 by Inc Magazine alongside Mark Zuckerberg, and has been featured on shows like Shark Tank and Oprah. System-wide revenue is expected to reach $10 million this year.

"There’s always going to be a need, or a pain, that can be improved upon," says Friedman. "Anything that solves somebody’s headaches or frustrations is a solution, and solutions are businesses."