It's always difficult to leave the audience with a good punch line (chart). Things I prefer not to do:
  • Explicitly ask for questions - there could be none (anymore)
  • Read out "summarizing" bullet points from a slide that re-run the entire presentation in a very boring fashion
Instead, I often put a page-filling "uplifting" picture on the page (or repeat a key image from the presentation) and repeating one key message of the presentation, maybe spiced up with a bit of humor.

As an example, I found the above image of a man sky diving off a sky scraper in Bejing on iStockPhoto.

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