One day in the middle of my first-ever book tour, a thought woke me up early in the morning. I'd just had an event at a popular L.A. bookstore. I saw old friends, answered great questions, sold a good amount of books. But that next morning I realized: I hadn't tweeted it. My book is related to Facebook, so I'd created a Facebook event page, told all my book's fans there, as well as my own friends. I'd e-mailed people I knew in the area who might not be Facebook-friendly. I spread the ....

