Dr. Mark Costes has a wealth of experience in leadership and practice management, having owned more than 15 dental practices and employed hundreds of people throughout his career. He now has a group of seven practices and a consulting company in the Dental Success Institute. What qualifies him to be a coach? “Having made all the mistakes in the book,” he says. He urges dental students to learn from his experiences, immerse themselves in all of the free self-education resources out there and get out of their comfort zone.