This new documentary looks good: (Food, Inc. trailer: http://www.youtube.com/watch?v=mf4ZmfjyEvI ). So I went to the website and found a simple postcard with 10 points about what you can do. It's USA-centric but I though it had some good (though incomplete) points. I whipped these up very quickly just as an experiment. The slides were created in Keynote, saved as JPEGs, and put back into ppt (also as an experiment to see how the render in Slideshare). Aspect ratio is 16x9. I have no affiliation with the Movie whatsoever, just an interested 3rd party.
Clipping is a handy way to collect important slides you want to go back to later.