Ghost in the Mirror
Even if you tend to be scared of your own shadow, you'll still smile at your reflection, thanks to this friendly spirit on your mirror. The cutout is made of frosted-glass window film, which adheres easily and (like ghosts everywhere) disappears without a trace. Download the template, trace onto the film, cut out with a pair of scissors, and apply.
Frosted window film, $11 for 9 feet, interiorplace.com