I typed up all the common interview questions and answered them. I had my parents and friends look at the document; if you could, I'd see if a prehealth advisor would read your answers over. Don't memorize them word for word, but say them out loud enough times that you've got them down. Ask friends to ask you questions, and practice your answers/cadence/tone/eye contact. If you can, do a mock interview; if not, see if a friend will interview you. Stalk the school's website to answer the "why this school" question; also be prepared to answer "why this city/state" if you are from far away or OOS. Have GREAT answers for:
Why medicine?
Why this school/area?
Tell me about yourself.
Is there anything else you'd like me to tell the adcom?
Tell me about some of your clinical experiences/research experiences/service experiences.
When did you first know you wanted to be a doctor?
How do you deal with stress?
What do you do for fun?
Tell me about a challenging/stressful time in your life.
Any questions for me? Look at the school's website to find questions about the school (preclinical curriculum, organization of clinical years, affiliated hospitals, student life, mentorship (research, shadowing, an older med student, or in terms of choosing a specialty), any "doctoring" classes/whether there is early patient contact, what kind of electives are available, if the administration is responsive to student feedback, student life, student opportunities like free clinics etc.)
Be ready to explain any semester of low grades or any W. It might not come up, but if it does you don't want to be floundering around and turning bright red.
Finally, read over your AMCAS app and, if applicable, the school's secondary essay questions! Know what you said about your activities and what you said in your PS. Make sure the answers you give in your interview cohere with what your essays said, so that you present yourself in a consistent way.

