Duplicate your documents in the blink of eye (Photoshop CS/CS2/CS3/CS4)

When photo retouching in Photoshop, you should always keep a copy of the original image, just in case you have to go back to it for any reason. With that said, a fast and easy way to duplicate an image that you want to adjust is to simply choose Image > Duplicate. In the resulting Duplicate Image dialog box, name the duplicate image and click OK. Upon doing so, Photoshop opens the new document and you can retouch it without worrying about altering the original image.