Coaching a youth sports team is as challenging as ever these days. Whether it's a T-ball team with 5- and 6-year-olds, an under-10 soccer team, or a travel basketball team with a roster of experienced players, coaches face a lengthy and imposing to-do list. Among the responsibilities are teaching skills, organizing productive practices, managing game days, instilling life lessons, and--most important of all--meeting the diverse needs of every child...