Blank notecards (may be purchased at office supply stores or some stationary and craft stores)
Photo editing software
Sketch out and watercolor an owl on watercolor paper. There are some good tips on watercolor technique here. If you aren't great at drawing owls, you can get a piece of flat watercolor paper, cut it to 8.5×11, put it in the bypass tray of a copying machine, and copy an image onto the paper. Just be sure to iron the image after so that the ink sets and doesn't wash off when you add water with the paint!
Let the image dry and scan it into a computer program like Photoshop.
Set up the image to print properly on some blank notecards. These are available at office supply stores and some stationary and craft stores.
© Backstgartist's tutorial was taken with permission, and may be reached by e-mail.