[DanInTokyo]

Engage the folks there in person - look them in the eye (as many different people as you can).

Try to generate some interaction - ask questions, preferably ones that can be answered with a show of hands.

Breathe.

Know your material, but don't try to memorize it. Work it like a TV sports anchor - know what's going on and the details and ad-lib the specifics.

Smile and seem/be genuinely happy to be sharing this information with your audience. Wanting to be there is obvious, and so is not wanting to be there.