Arrive 15 minutes early.
Do not dress in costume unless requested, but dress to impress in attire that suggests the role for which you are auditioning.
Sign in immediately to secure your place in line.
Pick up the "sides" (see glossary). If possible, get the sides a few hours or a few days before the audition, as necessary, in order to practice.
Be quiet in the waiting room. Be polite, and treat the casting director's assistants politely; they will mention any rudeness to the casting director.
Do any exercises that help you relax as you wait. This could be deep breathing, stretching, visualizing soothing scenes or quietly listening to music through earphones.
Walk with confidence, smile and introduce yourself when you're called in to the room with the casting director. Hand the assistant your headshot with your resume stapled on the back.
Name the audition piece you will perform, and go right into it unless otherwise instructed. Do not dawdle or hesitate in any way.
Thank the casting director and leave the room immediately when you are finished.
Sit down and wait an additional two minutes in the waiting room after your audition, to make sure the casting director does not want to call you back into the room for any reason.
Sign out and leave.