Become a Mystery Shopper
Perhaps the most low-effort way to make money is to monetize something you already do. That way you don't add more to your plate. If you enjoy shopping, for example, consider becoming a mystery shopper, or someone paid to shop in retail stores and report on the service you received and your experience in the store. It's an industry rife with scams, but real mystery shoppers do exist, and there's even a professional association you can join and get certified with to get access to legitimate listings. Competition can be fierce and sometimes you have to pay up and then be reimbursed for the things you buy and your time, but there are success stories.