List your stage name prominently (if you use one) in a well labeled and in an easy-to-spot location.
Be concise and straightforward. List relevant facts about your career without editorial comment or attempts to impress through persuasion. Listing facts in an objective manner is not only the most professional way to write a resume, it sends the message that you are confident that the details about your career, and eventually, your audition, can speak for themselves.
Select highlights of your work. Once you've been acting for long enough, you won't be able to fit everything on one page (or describe all of it even if it does fit). Therefore, when you have to decide what makes the cut. In some cases, it's best to list the most recent experience, such as times when you want to show that you've been working steadily. On the other hand, you may opt for listing your best roles, rather than your most recent, based on such factors as prestige, appropriateness for the current audition, or displaying your diversity as an actor.
Tailor your resume to the part you're auditioning for. If possible, highlight any past jobs you may have had that are similar to this one, both in terms of the role you're auditioning for and the type of play and production. Be sure to list special performance skills (such as dancing, juggling, or playing a musical instrument) you have that may be useful for the part.
Give greater attention to small roles in famous productions than to big roles in unknown productions. This is a general rule, and may be disregarded in "gray area" situations, but for the most part, it's more impressive to mention a chorus role in a major Broadway musical than a leading role in a community theater production.
Name names where it's appropriate to do so. If you've worked closely with famous actors or directors or if you've acted in big name theaters or companies, make sure these names are visible on your resume.
List awards and education in a noticeable manner (such as a bulleted list) but include this information towards the bottom of your resume. This is useful and impressive, but having it come second to your acting experience shows humility and a sense of priority.