Free Chik-fil-A spicy chicken sandwich
Start by finding a Chick-fil-A near you, then chose a date you want to redeem your coupon for a free sandwich. The site will tell you how many reservations are available on each day. You will also need to pick one of three time frames, though it's unclear if Chick-fil-A will hold you to your time.
Caveats: dine-in only. You must be 13 or older to take advantage of this deal.