The last thing you say to the audience is powerful. Drive home your meaningful message with:
- Quote that is most likely unknown to most of the audience
- Humble request at end about purpose of speech (e.g., "I hope you are now see why...")
- Clock - if you have a time-sensitive message, put up a ticking clock (e.g., countdown clock, analogue clock, etc.)
Ending,
Tim Wilson
Professional Speech Coach
Free speaking tips at: http://speakingquicktips.blogspot.com