I've been pondering and researching all week on how to better address presentation anxiety, which if you believe the stats, is the no one fear in the US, bigger than the fear of death itself! Anxiety is largely rooted in past experiences, so in our case somewhere along the line you have had a bad presentation, or believe that you are about to give a bad presentation. The reality is that the things you fear are extremely unlikely to happen if you give yourself time to prepare, and techniques like breathing, viusualisation or simple engaging with members of the audience before your presentation will help.
I'll be talking about NLP to alleviate presentation anxiety in my next post, but please follow the attached link if you want some direct tips. http://www.oatmealtraining.co.uk/News/Scared-of-public-speaking.html