If you want to market images, one of the best subjects that consistently sells is animal humor. Sometimes you may be lucky and capture a funny pose or interaction between animals, and other times you can create something digitally. For this picture of great Pyrenees puppies, I used black velvet as the background and the replaced it with a winter landscape. Then I added a snowy foreground from a different picture, and finally I added the hat. I had my wife wear the hat so it had a good shape, and then I cut it out and placed it into the picture. Using the transform function in Photoshop (Edit < transform > scale), I sized the hat to fit the puppy.
One of the puppies in this picture is the one I took home. To be honest, I'm not sure which one because they all look so similar. These pups were five weeks old when I photographed them, and the one I took home was small enough to easily lay on the dashboard of my car. Now he's 135 pounds and takes up the entire back seat!