get every piece of detailed info on what you will be speaking about till you feel confident about people asking you questions & you wont stumble in your speech either.
i love speaking to large groups of people, but only if its on a subject that i am 100% passionate & informed on.
"you have to know and believe in the product, before you sell it"
use that as a guideline.
PS If all else fails, get anti-anxiety meds
