The hall will more than likely have a conduct board comprised of students that live in the building that will be responsible for determining the sanctions of individuals that do not follow conduct polices. Your hall will have a hall counselor or resident advisor that is responsible for helping you have a successful experience living on campus. The hall counselor is the one that also makes sure everyone follows the appropriate rules and policies. If you want to make a difference in your on-campus living environment, get involved with some aspect of the hall in some way. There is no such thing as the perfect roommate.
Many people believe the best way to ruin a friendship is to room with a friend.
Be honest and be direct. Set standards and limits with your roommate, and handle the conflict as it happens. If you have trouble communicating with your roommate, talk with your hall counselor.