Researched the school, prepared responses to common interview questions, and did a mock interview.
What impressed you positively?
Faculty
What impressed you negatively?
Technology
What are your suggestions for the admissions office?
Show off tech if you have it - we saw nothing that showed you were up to date with medical training technology. I tried to ask a student about it without insulting where they were going to medical school but they brushed off the question so I didn't push.