One of the easier ways to make free money is with apps that pay you when you purchase certain grocery items. I'm not talking about Mr. Rebates and its ilk, although I like those, as well. Rather, I'm talking about the Checkout 51 and Ibottas of the world. I've discussed both in the past, namely here and here. Buy a product that is being advertised (My list for the week has 29 items, including Bounty products, Ritz crackers and Gain laundry detergent, among others.) and scan the receipt for cash back. Since there are multiple programs out there that offer the the same rebates, you can actually get paid back for buying food.
If you are not a member of Checkout 51 yet, I would really appreciate it if you used my referral link. I get something when you upload your first receipt. Thank you! Feel free to add your own links in the comments section.