I must be able to hear and understand you. Your voice must be strong and your enunciation and diction must be clear. If you choose to use an accent, be sure it sounds effortless to me. A poor accent detracts from your audition. Do not stand and read to me.
People are vital, physical beings.
Actions are connected to words and emotions. Do not simply pace back and forth, but use your body to help communicate and underline your feelings. We all do this in life, and in an effective audition you must use every tool available to you. The actors who are animated, without overdoing it, are the most interesting to watch. This character has moods, experiences and a point of view.