look in the mirror and suddenly you have a moustache!
If the moustache doesn't do much for you, then designcan.com has some other offerings. How about some antlers or a bird pooping on your head? Those are my favorites. The eyepatch with the parrot on your shoulder is super cheesey.
click on the "work" link, then the "self-portrait mirror" link.
Or simply draw something on your mirror at home. Just grab a Sharpie or erasable marker. That way you're not paying the designcan's designer prices.