Before your interview, definitely review your "resume" and other materials you submitted. A lot of interviewers like to ask you about something on your resume -- in part because it's a "softball" that should loosen up the interviewee and in part because they're interested. So, if you put down that you've been in Biology Club for 4 years, be prepared to discuss what the club does and your involvement in their activities.
This, by the way, folks, is one reason that you should NEVER embellish your resume. Take the above example, only, instead of being an active member of the Biology Club for four years, you attended only the organzational meetings (1 per year) for four years. When someone asks you what the Biology Club does, you'll say . . . what?
Nom interviews, even more than BGO interviews, can really run the gamut because what is asked and even what is covered is ENTIRELY up to the committee members. As with most interviews . . .
-- Maintain eye contact but don't try to stare down your interviewer(s)
-- Don't fiddle
-- Take justifiable pride in your accomplishments but don't brag
-- Be honest
-- Don't disparage other SAs or civilian schools
-- Show enthusiasm
Many of you will get a "hardball" question -- for example, what five adjectives best describe you (an actual question I once got in a job interview). Don't panic. Don't try to guess what they want you to say. Just do your best. And realize that all other interviewees got the same or similar question.