I've started paying closer attention to the "cash back" deals in the Wells Fargo app. I ignored them, because they seemed generic and/or useless (I don't shop at Gymboree or Ulta, thank you!). But then I got one for 7% cash back (up to $5.50) at Food Lion, for using my WF credit card (which already has 2% cash back on everything). I used that one, and got one for Domino's--10% cash back, up to $7.00. We haven't used that yet, but we do get Domino's occasionally, so we will. It's not huge amounts of money, but since they're places I would spend at anyway, why not?
Added bonus: for the Food Lion one, gift cards aren't excluded like they normally would be, because it's based on using a specific debit/credit card, and not based on just spending a certain amount (like those "free turkey is you spend $100" type promotions).