Enter the audition room with a smile. Be polite to the casting director and bring energy into the room. Casting directors are usually tired, overworked, and have seen many other actors before you. Stand out by being energetic and friendly.  Greet the casting director by introducing yourself. Shake their hand, if offered. The casting director may ask you to state your full name into the camera and turn to one side to see how you appear on camera. As you perform the script, make sure you pronounce your words clearly and loudly. Do not mumble or speak too low, as this will negatively impact your audition. Speak slowly and take your time. Use a positive, upbeat tone. As you will have the script memorized, look up at the casting director and make eye contact as you perform. Most casting directors are looking for actors who can be natural on camera, especially for television commercials. Try not to appear too staged in your audition. Project sincerity and honesty when you perform. Act like yourself. You may find your first read is much stiffer and staged than your second read. Try to relax, take deep breaths, and act more natural on your second read, if you are asked for one. After you do a first read, the casting director may ask you to improvise or give variety. Change up how you approach the script. Alter your voice and your body language. Do a different character or persona when you perform the script. Most casting directors will ask you to do this so it is smart to have a few alternative interpretations of the script on hand for the audition. The casting director may give you suggestions on how to perform the script or adjustments you can make on your second read. Always follow their instruction. Respond positively to their feedback and use it to make your performance better. Being able to take feedback from the casting director and run with it will show them that you are adaptable. It will also make it clear that you want the part and are willing to act as required to get it. At the end of the audition, you should thank the casting director, smile, and tell them you look forward to hearing from them. Leave the room on a positive note to increase your chances of getting the job. Then, wait for a callback from the casting director. You will usually get a callback within one week of the audition.

Summary:
Greet the casting director with a friendly, energetic demeanor. Enunciate your words and speak slowly. Act natural and sincere. Improvise when asked. Respond to direction from the casting director. Wait for a callback.