In 2008, aspiring architect Pat Flynn got laid off from his job at an architecture firm in the Bay Area.
After some mild depression and a return to his parents' house, the then 25-year-old decided to create a website designed to help others pass the LEED, an exam in the architecture industry.
Flynn's accidental entry into the online business world turned into a lucrative career. He narrates his sudden shift in his 2016 book, "Will It Fly?" which he self-published via Amazon.
After a year of selling study guides, classes, and practice exams, he had generated over $200,000 in sales. Since, the entrepreneur has built several other online businesses, including "Smart Passive Income," which earns him up to $170,000 a month, and sometimes more.
"Even though I've created successful businesses over the years, I've had a number of complete failures too," Flynn writes in his latest book. "When I look back and carefully examine each of these failures, the fatal flaw always comes down to one of two things."