i had good luck with following "i don't know" or "ortho" (both of which were true at the time) with "how did you make the decision when you were in my position". consistantly a GREAT conversation starter and a segue into a chance to get some solid advice about career choices. never be afraid to get to know these people - you NEVER know what you may have in common.
do your best to give credit, compliments, and attention to your fellow classmates, especially the quiet/shy ones. i know this sounds counterintuitive at some of the hypercompetitive programs, but believe me it works if you are sincere. besides, everyone complains about those programs being so competitive in the first place, so you can be a breath of fresh air and part of the solution. most folks will read this as "team player, confident, deferential", etc. this also puts you in a position to be protected/spoken well of when not around but your classmates are. assuming of course that you have not been a jackarse for the first two years, and that your classmates give you something to honestly praise them for. it goes without saying that these gestures should be genuine. avoid publicly displaying negativity as though your life depends on it, because it does. who likes to hang out with malcontents? also, actively solicit feedback continually, and make it clear to residents/attendings that you are not afraid of being wrong, but that you just want to be sure you are getting it right.
aaahhh, the wisdom of hindsight...
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