I hope orientation goes well for all of you, and don't go too crazy at the after-hours events, because you definitely don't want to be known as "the girl that blacked out and ended up on a bus headed for Jersey." Oh, and don't get all hyper-gunnery, because that's not the best way to make friends, either. One of my main mantras in life (borrowed from a wise member of the Jersey Shore cast) is, "Just do you," and ask any of my friends--I say it quite often (to the point where I have to find an alternative phrase to say when in front of attendings/residents).
I wish I was there to be the loudest member of the PCOM Welcome Wagon (and ask any 2015er, that's not an exaggeration), but alas, I'm 5,000 miles away