incrediBILL - 12:46 pm on Mar 20, 2010 (gmt 0)
I started way back with speech and drama club in high school, won some state level awards, the VP / Pres of student body, etc.
The only real trick is PRACTICE, be prepared privately, be unflappable publicly.
Literally, just find a few friendly faces in the audience and sell to them, ignore the rest.
Talk directly to the audience, not the screen, not your laptop, not the wall.
Be prepared to speak passionately from what you know, having a prepared set of bullet points is good but don't just read the bullet points on your presentation, BORING.
Talk to the audience about what's on the presentation, they can read the slides for themselves, just make sure you give them enough time to read the slide.
Don't let hecklers or questions befuddle you, have a few answers prepared in advance.
Above all, always wear Depends in case you totally lose it.