Step1
The first step of auditioning is selecting the part that you think suits you and your abilities, and that you want to try out for. Ask some people who know what you are capable of and have worked with you before what they think will be the proper role for you. Think about the vocal range of the character and also the difficulty of acting out the character. It's okay to try out for a minor role.
Step2
Once you have selected a character to audition for, you need to know the part. This means that you know the character's personality and the values they embody, the conflicts they must overcome, how they feel about the other characters in the show, and other things involving the character's ideals, dreams, and internal wishes.
Step3
Many auditions have you do a sample reading taken out of the show. This is usually something that you have never seen before, so try to read through it as much as you can before you are asked to present it. Don't be intimidated by this, it can give you a chance to express the full potential of your acting ability.
Step4
When reading the part for the first time, think of the character and what they feel about what they are saying. Don't overact, though, because this can make you look fake and the directors won't go for that. It is really easy to tell when someone is over acting. To avoid doing this, don't think about how the character would say a certain line, but think about how YOU, personally, would say it. How would you feel about the situation with the plot if you were in the situation of this character? Why do you think this particular line is important in the story? Also think of the reason the director chose this selection for you to audition with. Remember to react the way that YOU would react, but keep the reality going by making the character YOU. Remember, the director just wants to see how well you can act, not how well you can imitate the character you are trying out for. The director will see your talent and later on tell you what changes to make. That is the key to acting!
Step5
When meeting the director for the first time, make yourself look presentable. This can be done by simply acting confident and friendly. Make him/ her know that you are ready to fully commit to the production. Some directors may seem intimidating and scary, but don't let that bother you. Remember that the directors mean business, and although he/she may seem scary, that person is just trying to convey their seriousness about the show to the potential cast members. If you can see through that and remain cool and confident, they will admire you.
Step6
Be respectful of the place in which the auditions are held. This must be done not only in the sense that you restrain yourself from littering or vandalizing the area, but that you respect any traditions or rituals kept in the place. For instance, not stepping on a certain carpet or tile that is good luck. (Trust me, there are such places in existence.) And also remember not to treat others disrespectfully, (you never know what may come back around and bite you in the rear!)
Step7
Finally, remember to be on time, prepared with whatever the director asks you to bring, (for example, a prepared song, head-shot of yourself, list of experience, or resume) and come with a smile on your face! There's nothing more impressive than a sense of passion in what you do, and it is also good to let the directors know that you are actually happy to be there.