Improve your speaking skills
One of the things we want to do for Tech Ed New Zealand this year, is raise the quality of local speakers.
We might set some hard goals around this - something like local speakers must score 7.5 or higher on average to be asked back next year. Nigel and I have talked about this, but we haven't decided wether we will or not yet (feedback welcome).
Anyway - if you want to raise your own game, find and attend a toastmasters club near you. I found toastmasters really good for raising the awareness of what makes a great presentatin - even though I never finished the course.
For a listing of New Zealand clubs - go here and select your area/town (middle of the page on the right).