Gain Confidence, Practice Talking

Get your hands on some kind of voice recording device. An answering machine, a mobile phone that
takes personal messages, a microphone plugged into a computer, whatever. Practice talking to it and
play it back. You might be surprised to find out what you hear.

The idea behing this is to ensure that you project a clear and precise presentation of your voice.
Try sound enthusiastic and confident. Vary the tone of your voice, don't drone on in a monotone
voice.

Taking this idea further you could get a friend to ask you questions and record yourself answering
them. This might also take your mind off the fact that you are being recorded as your mind is busy
trying to answer the questions.