Ten years ago, I sent a letter to the families in my pediatric practice telling them that I was retiring. I hadn’t yet turned 40. The reasons for my retreat would fill their own blog post – possibly their own entire book – but for the sake of this story, I will keep things simple. One day, in 2008, I left clinical and set out to become a full-time writer. For the next year, I researched and wrote about the 25 things parents...