[jyl]

Video tape yourself. Have a written script, memorize and practice, after you're sort of smooth, start adding pauses, inflection, hand motions. Then reduce script to list of key points and phrases, so you're not "reading". If you'll be using a mic, practice speaking into mic; if no mic, practice projecting voice. Depending on audience, have a few optional bits - if audience really responding to X then add Y, if X is flat then delete Z.

I really enjoy public speaking. Weird huh.