Professional speaker Nate Dunlop recommends identifying comparisons to use in your metaphors by asking is your comparison... :
- Relevant to your message? - your comparison should communicate the meaning of your speech's message
- Relevant to your audience? - your comparison should be something your audience immediately knows and understands without having to do extra research
Tim Wilson
Professional Speech Coach
Free speaking tips at: http://speakingquicktips.blogspot.com
