This year, as I do every year, I plan to help my students develop the life-long skill of delivering good presentations to an audience. To that end I try to make my students strive to take Guy Kawasaki's advice about font use on slides. Guy Kawasaki is one of the best presenters that I've seen. In the two minute video below Kawasaki shares his advice for delivering an effective presentation. In the video he is speaking to a tech/ business audience, but 98% of what he says applies to any audience.
For a bit more in the way of presentation advice, particularly regarding slide design, watch this ten minute talk by Garr Reynolds. Reynolds is the author of Presentation Zen.
And here is Reynolds putting his advice into practice at TEDxToyko.