Flickr can be a good place to find Creative Commons licensed images to use in blog posts, slides, and other multimedia presentations. The Flickr CC Attribution Helper makes it easy to format proper attributions for the CC licensed images that you use. In the video below I demonstrate how to find images and how to use the Flickr CC Attribution Helper.

creative commons licensed (BY) flickr photo by dawnhops: http://flickr.com/photos/seenoevil/330695598