Speech coach Nick Morgan suggests you do a dress rehearsal in the room you will be presenting in:
- Examine the space - walk around the front of the room, sit in the audience in different chairs, stand in the doorway, etc.
- Make sure you'll be heard - ask someone to sit as far from you as possible and make certain they can hear you throughout your speech
- Get comfortable in the space - do some form of a stretching or relaxation exercise to get physically comfortable and relaxed
- Rehearse the speech - do your speech all the way through, from beginning to end - if you have people in the audience, after you finish, get their opinions about your delivery
Tim Wilson
Professional Speech Coach
Free speaking tips at: http://speakingquicktips.blogspot.com