I took a wonderful course in April of this year – Train the Trainer with Harv Eker (if you ever open your mouth in front of an audience TAKE THIS COURSE! yes, i do recommend it that highly and i dont do that often. go to www.PeakPotentials.com for details)
Harv recommends that you start each presentation by asking 2 compelling questions to your audience. The key here is to pick 2 questions that will engage EVERYONE in the audience. So each person in the audience must answer yes to at least one of your questions (if not both).