Perform your works for others before you audition -- Practice performing for others. You should especially seek honest feedback from music teachers.
Come prepared to perform as a soloist or with an accompanist. If you don't have an accompanist one will be provided for you at your audition. Please donot bring a CD as your accompanist, as this reflects poorly on your musicianship.
Introduce yourself and the pieces that you will perform.
Dress professionally. The way you dress reveals your attitude about music and performance. If you want to be taken seriously in your audition then you need to dress accordingly.
Promote yourself. After your performance you will have an opportunity to talk with the faculty. Take this opportunity to persuade the faculty that you are worthy of a scholarship and that you have great potential.
Write professionally. In your written correspondence with the department, such as e-mail, use correct grammar and punctuation. Sloppy, error-filled writing reflects poorly on your ability to succeed in an academic setting.
Don't Panic. If you make mistakes keep trying. In your audition you will be judged partially on your ability to adapt and on your potential.