Did you prepare your kids to be good college roommates?

I always tried to teach my kids to be respectful of others and to expect respect in return. I don’t think I had any “lessons” specifically geared towards freshman dorms. My kids dealt with different circumstances (S was not good friends with his freshman roommate who too often drank to excess often but they managed to coexist peacefully for the year, D was friends with freshman roommate) and both were fine.