Del Taco is one of my favorite restaurants. They have ongoing promotions and coupons, and you can check here for their Coupons and Promotions page.
I have used their 2 for $5 Chicken Classic Burritos, Thursday special 3 chicken tacos for $2.09! 🙂 There are others such as buy one get one free of fish tacos, Tuesday Specials of 3 Tacos for $2.09.
You can also sign up their Raving Fan Club to get free food and other insider treat delivered to your inbox!