Enter, Ibotta. An app that is basically like one big mobile coupon, only better! You can use it in addition to coupons and store discounts.
How does it work? After you download the app to your phone, you will be able to browse rebates. You will need to unlock each rebate you wish to redeem. When you go to the store and make a purchase of these items, you simply scan the barcode and take photos of your receipt. After you've submitted the requirements, you will receive a credit to your account. I usually see the credit hit my account in 24 hours or less. Through the app, you can also earn bonuses for buying specific items or spending amounts in goals. There are so many ways to earn money with this app, and it's free to use. You do not have any obligation to redeem anything or to continue using it if you decide it isn't for you!