You'll learn more about male genetalia than you ever thought necessary, guys talk more about that than women and sex put together. Beware the freshman 15, or in some cases, the freshman cup size. Even though the beds are long, they are also extra narrow. Things that were a huge deal in high school are now commonplace. You never thought you would share so much about yourself with people you have known for such a short time.
Computer games go in and out faster than the latest fashions.
Any game can be made into a drinking game. Disney movies are more than just classics. Find one thing you like in the dining hall and go with it. You will hear more stupid nicknames than you ever thought possible. Phone calls almost never happen and when they do, you just don't get the messages.