2013-02-11 When you hear, “It’s all who you know,” it sounds so intimidating — like you need to be a former roommate of Mark Zuckerburg, cousins with Richard Branson, and dating Taylor Swift. But simply contacting a stranger can lead to a worldwide network of connections. When I was 18, at Berklee College of Music, we had a guest speaker named Mark Fried, who was an executive at BMI — a big music