Apparently I’m very sheltered because I only heard of Qdoba a few months ago. Now they seem to be all the rage!
Head over to the Qdoba website to build a meal. When you get to the end of your meal, you should get a great coupon! I got a B1G1 coupon (and made a Taco Salad), but I believe there are also 50% off coupons and free drink with purchase coupons. Coupons change daily and you can come back each day to get a new one! The coupon I got expires 8/27, so you might want to plan your visit before printing!
(Thanks Common Sense With Money!)