I know I have touched on this subject before, but this is a bit of advice that I don't think can be overstated. If you do an audition, and the person hearing you hands you their card, and says "please stay in touch with me, I would like to keep track of what you are doing", do it!! I just got an update this past week from a young singer who did our Young Artist Auditions last year. I didn't hire her, but told her I was interested in watching her progress, and she followed up - this person has now upped their chances of getting hired here because of that simple step.
You would be amazed (or perhaps not!) how many times I have told a singer to keep me apprised of what they are doing, and then they didn't - that is a missed opportunity!
Remember, this is one of the simple things you can do to give yourself an opportunity to get hired!