Long before your child sets foot in his dorm, you'll begin the transition to college-style parent. It's a transition fraught with misgivings and exuberance, with self-doubt and bursts of confidence, with joyful letting go and tearful hanging on. And in case you think these refer only to your child's feelings, they don't. These [emotions] besiege just about every parent along about second semester of junior year in high school. That's when the reality sets in that your child—not someone else's this time—will be going off to college.