Aaron Gaynor took that old adage to heart. After joining the plumbing industry out of high school in 1997, he and a friend decided to open a plumbing company in the early 2000s solely focused on new construction. They grew the business to $3.5 million before losing it in the Great Recession of 2007. Instead of throwing in the towel, Gaynor saw it as a lesson learned and started over with a new residential plumbing service company.