Just talk a little about what you're gonna miss and how you're taking the whole thing... if you've already moved out, talk about what it's like or what it was like for you freshman year.
also.. talk to EVERYONE. in class, dont get shy. be like wassup to people to everyone u see. be friendly. i see a lot of kids who dont talk in class and class gets boring when u dont talk to people or know anyone. just be friendly.. people like friendly.