There is a coupon for $0.50/1 Old El Paso product available on Coupons.com. This coupon seems regional. I used zipcode 90210 to find it. You can use this coupon to get the taco kits or cans of refried beans for very cheap or the taco seasoning for free.
Here are other coupons available
$1/1 Dibs 140 value pack (some stores are running frozen items or dairy products promotions right now)
$1/1 Eggo product at Target (still available using zip 90210)