Mother Teresa collected some of her thinking into books of prayers. Colin Powell and Rudy Giuliani wrote books reflecting their leadership values. Harvey Penick collected his thoughts in a series of small books. Rosabeth Moss Kanter is a prolific author on the impact of change on management and culture. In their writings, as well as their television or video appearances, these leaders are extending their message, increasing the likelihood of its being understood.
Your presentation is composed of words and possibly images. Most important, it contains you. Your challenge is to leave a little bit of yourself behind as a means of furthering your message. Make a copy of your presentation and offer it to the audience. Or, if that is not possible, post your presentation on a web site so that others who did not hear it can access it.