If you don't want others to use your photos and images without your permission, you can create a so called custom watermark with your name or any other text you want.
Fun, yet very useful tutorial, where you manipulate a photo in a way it will look like you're standing next to Brad Pitt or any other person in that matter.
In this interesting Photoshop tutorial I will show you how to move, rotate, resize and overlap individual letters, numbers and other characters in text.