I know this many seem rudimentary, and perhaps for some of you, it in fact is, but.....
Do review your entrance (I mean into the room, not musically), your intros, and your exit.
I know it seems a cliche, but it is in fact true, that we as adjudicators and potential employers start judging you the second you walk into the room.
So, walk with confidence, showing who you are. When you speak, speak clearly. When you introduce your aria, make sure you can pronounce the title and the composer's name correctly (I know that really sounds rudimentary, but you would be surprised how often this is not done well!). When you have completed your audition, thank your panel, and walk out with the same confidence that you walked in with, no matter how you think you just did.
These small things can have a BIG impact on how your audition is received.