a current student here
Winters here are absolutely brutal, and they start early. Make sure you either pack a nice, heavy coat, or you go right out and buy one once you get here. I only came from an hour away, and the difference still was enough to shock me.
If you're coming in as a freshman and staying in the dorm, take advantage of the mentor activities and the activities the RAs run. Yeah, they seem corny and dumb (and the mentors/orientation leaders tend to treat you like you're still kids if you let them), but they'll help you get out and meet people. There's an amazing sense of community here and everyone's more than willing to include you, but you have to put yourself out there first.
Don't walk across the quad. Just. Don't. Skip, cartwheel, roll across it, nobody will care... but if you just walk directly across it, you will have committed the highest of the stumpy sins. People have gotten tackled over this.