To create a photo Christmas ornament, start by selecting a high-quality photo print. Next, cut the photo to fit the shape of the ornament. Once the photo is cut to size, use a decoupage medium to adhere the photo to the ornament. Allow the decoupage medium to dry completely before adding a decorative finish such as glitter or sequins. Finally, add a ribbon or hanger to the ornament so you can hang it on your Christmas tree.