Remember to emphasise words as you are making your speech so that people don't get bored listening to a monotone drone!
Also watch out for any mannerisms / habits you might have (and worse, might not know you have) such as jangling keys in your pocket, playing with your shirt cuffs, saying 'erm' every other word etc etc. People like me pick up on that and spend more time counting how often you do it, than they do on listening to what you have to say.
Finally, a chinese proverb: "I hear and I forget, I see and I remember, I do and I understand". It might not apply to your subject, but it demonstates the value of presentational aids and audience participation (where appropriate).
Last edited by tonkatechie; 28th Sep 2006 at 00:11.
Reason: Edited to add: Good luck!