I agree that there's probably no amount of practice that makes any high-stakes public speaking event not a little bit nerve-wracking in the anticipation. I hear that even seasoned stand-up comics, the few hours before the show are the worst. It's the "c'mon, c'mon" killing time part. It tends to disappear on stage, but the waiting is the difficult part. Sweaty hands. The genuine feedback piece is very true. It's humbling to find out that the things you believe work don't, and people don't even care about your acne or high-pitched voice, and that they instead love the things that you didn't even consider highlights.As someone who went from 'nervous the entire day leading up to The Talk' to knocking a presentation out of the park with not much more prep than bullet points, I agree with goobster in that there is no trick out there. There's practice, in the case of public speaking practice really makes perfect.