Find out as much as you can about the ballet companies you want to audition for. Different companies have different styles and requirements. Those that are traditional do not want someone who dances improv and modern. Learning these requirements early in your dancing career will point you in the right direction.
Work with a coach or teacher who shares your goals and ambitions. Find a teacher who knows the company you want to dance for, or at least knows its style and requirements. Learning from someone who shares your enthusiasm and goals will greatly prepare you for that all-important audition.
Train and dance as often as you can. Dancing for a ballet company takes many hours of practice and dedication. You need to put in just as much, if not more, time into the training before your audition. Listen to your teacher or coach. Find a mentor who is already dancing for the company you want to dance for. Learn your dance routine for your audition until you can perform it perfectly.
Follow registration directions carefully. Many companies disregard any registration that is wrong or incomplete. Check everything on your application for accuracy. Find out when the company takes applications, where it is and what information it requires from you. Follow all directions to the letter.
Arrive at your audition on time. Attitude is part of a great performance, so go in with a winner's attitude and come out with a callback.