If you’re using Google Chrome and you use Flickr to find Creative Commons licensed images, you should get this. It’s developed by Alan Levine (@cogdog) and it basically gives you a what you need to copy and paste to give credit to the creator of an image you use.
A four part video series created by Kirby Ferguson. I’m not sure when this came out, but part 1 was released on or before 2011 (why can’t I find this information?) You can watch all the parts on his site (http://everythingisaremix.info/), but I’ll also post Part 1 here.