Take classes from a reputable coach. Ask questions regarding his or her background and experience before signing up for any acting classes. It is also a good thing to check up on references that any coach may offer. You must make sure the acting coach is a good fit for you, because he or she may have the key to helping you ace the next audition.
Look at yourself in the mirror as you perform your monologues. Pay attention to your facial expressions, and look for any awkward gestures you may have a habit of making. You will become a better actor when you can let the words speak for themselves.
Watch yourself on video. Many auditions will be videotaped, and you must be comfortable in front of the camera to stand out. Watch the tapes carefully for excessive movement, head bobbing and eyebrow raising.
Perform your audition pieces in front of anyone who will be present. They don't even have to pay attention to you, just be in the room. You must get comfortable with people being present, but not necessarily paying attention to your monologue during an audition.
Ask the actors, directors and theater folk you know many questions. An artist can learn a lot from the other people approach their craft. Ask your fellow actors how they prepare, what their method for acting is and where they have learned the most valuable information for acting skills and auditions. You can become a better actor by taking some tips from the actors you admire.