Manage your perception, so that you look and sound as confident as you are

Convert your "nervousness" into positive energy

Get rid of "junk words" (uh, uhm, you know) and qualifiers (I think)

Use fewer powerpoint slides and make them as simple as possible

Front-load your information to get to the point quickly and make your ideas "stick"

Don't stand behind the podium. Walk around, and talk to the audience - without a script or notes!