TinEye is a great reverse image search online service, that can tell you where an image came from, find different sizes of the image and you can find out if someone is using your image without your permission.
Some websites overlay their photos and images with another blank image. But there's an easy way to download those pictures if you are using Google Chrome browser.
A fun graphic design tutorial, a bit longer but still quite easy to follow. We will end up with a stylish looking, ink dripping smiley face. This is part one of the tutorial.