Class of 2012. You're welcome.
I got some good advice this week. Advice that if I hadn't asked for it from someone who wasn't my supervisor, I would be totally freaking out.
Go into an interview knowing and being ok with not knowing everything. Ask good questions. Be interested and present. School won't teach you everything, but it has given you a good base. Be willing to learn, and willing to engage. Tone yourself down (maybe that's just for me, ha!), but bring your personality.
Trust your gut, and you'll be fine.