"Make sure to preview your room."

Definitely!! Whether or not it is your first time at the school, ask other students about the housing, specifically for any environmental problems they are aware of. My second year at tech school I was assigned a ground floor room in a dorm that was known to flood up to 6" in the rooms on the ground floor. All the other dorms were completely full, so I immediately went and got on the standby list for the better dorms in case anything came available. It turned out they had assigned a handicapped student to the third floor in a dorm without elevators. On the third day we swapped. Problem solved!

Oh! And file everything official they give you or have you sign. Later, when you have a problem and they have 'lost' your records, you'll be able to prove things and cover your butt! Enjoy!!