For the longest time, based on no evidence other than our own insecurity and sense of incompetence, my wife and I were convinced that we were the flat-out, no-question-about-it, least-skilled parents in the country. Furthermore, we were convinced that every other set of parents we knew was perfect. They were more thorough in going over their kids' homework, they set better boundaries than we do, didn't let their kids watch as many hours of TV as...