Always looking for ways to improve any speeches and presentations, the article Finding the Right Metaphor for Your Presentation (Harvard Business Review) caught my attention. I think that using metaphors, illustrated by clip art, do give your listeners a “hook” to help them remember your content.
I especially liked the chart in the article that lists cliché metaphors, and then more unique examples for the same concept. (For example, instead of a handshake to illustrate partnership, a photo of Fred Astaire and Ginger Rogers.)
A Life in Libraries 