Most everyone, in one way or another, play at least one sport in their life, whether it's in high school or college.   They learn the valuable lessons of teamwork, good sportsmanship, how to be a leader, and that it's okay to make mistakes, among other lessons.  But for coaches, how do you know if you're being a good coach?  To address this issue, John O'Sullivan, author of the book Every Moment Matters: How the World's Best Coaches Build Championship Teams, spoke with Hanna and Cari about what a good coach does for their teams.