We generally eschew photoshop. Sure, we'll crop a little, and rotate by a few degrees (to level things out), but otherwise we leave our images pretty-much as-they-were-captured-by-the-camera. But.
Yesterday we helped brew a batch of lager, tentatively named "Leaping Lurcher Lager". We plan to put our leaping lurcher photo, from May of 2009, on the label. However, in the photo, the dog is moving from right to left, while the label will, of course, read from left to right.
So, we will "flip" the image, such that, on the label, the dog will be leaping in the same direction as your eyes are now moving while reading this.