Hi Susan, I´ve read your thread and agreee with most of the manners folks use to deal with anxiety prior to presentations.Another way that I´ve heard , is to use a medication from the betablocker group, that is used for several conditions, thar decreases the simpathetic
discharge that happens when you get anxious(sweating,tachycardia,hands shaking,etc), so they get more calm to perform.
But i´d not recommend to use it without a medical orientation, ´cause there are situations in which these medications should not be used and some people(musicians that made use of them) say that sometimes the presentation could get too plastic or cold ,ok?(just for your knowledge).
       best of luck
                   Joe