Also, be ready the moment you walk into the building!
My son just completed a MOC interview that was held at a local college, vs the MOC office. As we walked in, there was a sign-in table with a couple of guys standing around it. We were 20 mins early for a 1 pm interview, so we expected to sit around awhile BUT even as he was signing-in a few of the guys started peppering him (and me!) with questions, right there in the hallway! Mike handled it well though and I think they started right in on him because he was in his Sea Cadet's uniform and looked sharp / ready.
After about 15 mins of chatting about "Why USNA, years w/Sea Cadets, were Mom and Dad OK with his decision to apply, etc." the guy doing the asking said, "Well, we're halfway done the interview, let's go down to a room and finish it off". YIKES!
Please note that Mike's expereince is probably very different than what the rest will be like. In the end he met with just a couple of ex Navy men (vs a whole boardroom like we expected) during the other 15 mins, and they mainly chatted about is extracru's. They even hit him with a "So what else do you want to ask us" question. Luckily for him he had just read an article about North Korea's situation so he asked the "board" what thier opinion was of the future there. I bet that caught them off guard, i.e. a tough question from a high school kid....
Afterwards Mike and the head rep (a current BGO and ex Navy Captain) came out and talked w/me for another few minutes, mainly about the fact that while Mike was considered to be in his "top 5%", that the DODMERB DQ on his record was going to be a problem, so here were some suggestions, etc. Nice!
Again, this expereince was probably VERY unique but keep it in the back of your mind nevertheless. Note too that I sat in the waiting area and saw a number of other kids sign-in and none of them got the attention my son (and his Sea Cadet uniform) got....the rest were just in suits/dresses, and were told to sit tight until thier interview time....
In closing, make sure your son/daughter not only looks sharp clothing / hair wise, don't be like the kid that showed up in brand new clothes BUT was also wearing an IPod set of headphones, reading an very old dogeared book, and carrying a LOOSE/FOLDED/BUNCHED UP copy of his interview letter/resume/transcript. Nothing worse than blowing your first impression with a bunch of loose paper, etc - get a nice binder to carry the paperwork, and leave the rest in the car!
IMHO - Dan