Do you have kids who are dreaming of going to college? How do you know if they're really prepared?

We dropped our second son off at college a state away from where we live this summer. Eleven hours in the car meant that we had ample time to talk through whatever we felt hadn't been said, but it also meant there was as lot of time for reflection on the past 19 years of his life.

What are the most important things to impart? What are the big life questions that need to be broached before a kid is launched from our home and onto a college campus?