Seeing is believing. A picture is worth a thousand words. Seeing once is better than hearing twice. We visual creatures love show and tell, and we have the clever quips to prove it.
Please see my FlickR page for a quick survey of some case studies http://www.flickr.com/photos/drcaughey/ – or – depending on your interest, take a deeper dive into case studies of a specific category by jumping to any of these links: