Few tips I can randomly come up,
- The most common, be yourself. Don't carry the weight of interview on your shoulder, something like, this is it, make or break.
- If you have had any research exposure, be prepared to delve over it in your discussions in depth. Convey your enthusiasm uncovered during the experience. But don't panic if anything asked beyond the scope of your work or don't know. Convey the same. If you haven't had any research exposure, don't worry.
- Don't be under any rush to answer right away. If something asked which involves some time to recollect or think over, say so to the interviewer and pause.
- Don't heed to the advice some folks give about always making eye contact. No, you can look away while collecting thoughts and then restore the eye contact when resuming the conversation.
- The first of the interviews is with a faculty of arts and science. They may not be too keen on knowing why you want to do medicine and what made you come up with the decision so early in life. They may assess your general personality. The second interview with a med school faculty may be more interested in the above.
- Since this is a liberal arts focused program, It is possible the faculty of arts and science may notice that you may have completed course work in their field (a rare possibility though), such as history, psych, human geography, government etc, especially if you are currently studying one, they may ask you few questions about the course work. So brush up relevant material in any such course work you are currently taking in senior year. If the faculty is from science, they mostly won't care.