Select a story that had great emotional impact on you.
Make sure the story has an implied message that is right for the audience.
Tell it well, with strong emotion. Pull out all the stops.
End with an uplifting "lesson learned."
Drag out the story. Short is better than long.
Try to explain a lot. Let the story do the work.
Think you can be detached and be successful. You have to bleed up there. But it will be worth it.