Uber Employs 200 Ex-Founders and CEOs. We Asked 10 for Their Lessons Learned. We go to the experts.

The ride-hailing giant employs more than 200 ex-startup founders and CEOs. We asked 10 of them: What lessons have you picked up?

1. Stay focused.

"Having your own company is a lot easier than working in-house. Working at Uber is much busier. It's easy to get caught up in the busyness here, but my boss put it very succinctly to me one day: "Just focus on the work.'" -- Peter Markatos, director on brand team (previously cofounder, MM)