Like it or not, our industry is one dominated by young stars, and the social-media side is filled with them. I'm fortunate to work with some of the brightest young people I've ever encountered. Yet youth comes with a certain level of inexperience that only years in the industry can fill. The writer Malcolm Gladwell has popularized a theory that you need to work 10,000 hours at something before you can be great at it. That reminds me of a lesson I learned once from someone twice my age: "It's OK not to know everything."