Get a free sub sandwich at Quiznos when you buy one and a drink. Use this coupon. Expires Oct. 26, 2009. You can also get $1 off select sandwiches with a coupon through the above link, but this deal has a lot more restrictions.
Caveats on the free coupon: not valid on delivery orders, participating locations only, one coupon per person per order, cannot be combined with any other offers.