1. Know your resume, like everyone says.
2. Be prepared to talk about anything weak that may show up on your resume or transcript. This includes LSAT scores or GPAs or whatever. This caught me off guard. Usually in interviewees you get the "what's your weak point" question, which is crap I think, but in my interview they pointed at my flaw and said "why." I spoke to my gf about when she interviewed with them and she said they did the same to her. This is the biggest thing IMO.
If anyone has any questions, PM me.