Show up at any Chick-fil-A today dressed from head to hoof like a cow and you will be rewarded with a free meal. Partial costumes get partial prizes: a free entree. If you're really crafty you can submit photos of your costume for a chance to win 50 free Chick-fil-A meals and other prizes.
Visit http://www.cowappreciationday.com/ for all of the details, a printable costume kit, and this awesome video.