Persuasive Public Speaking. One of the most effective ways to persuade your audience is to relay a personal story or an example that shows the benefits of your recommendation to your audience. Religious leaders have used this technique for over 2000 years with great success. This video explains how the persuasive public speaking technique works. Fearless Presentations is a presentation training course offered in major cities all over the world, and here is a video from Doug Staneart, CEO of The Leader's Institute, who gives a explains this technique in the courtyard of the Vatican.