The idea behind cashback is simple: you get rewarded for purchasing or using products you plan to buy anyway. Cashback sites pay you when you click through them, go to retailers, and spend. For example, check out eBates.com - There are over 2,000 stores to choose from including Walmart, Target, Sears, Calvin Klien, and others. You also get a $10 gift card after your first $25 purchase. Sign up is free. (If you encounter a cashback site where it’s not, avoid it.
Using a food delivery service can’t necessarily earn you money, but it can help you save you money if you constantly find yourself throwing out half the food you buy. Food delivery services send a box of food every week with new, sometimes unique vegetables, meat, fruit, and so on. If you don’t have time to shop and want simple meal-prep that leads to a good meal, a food subscription service may be perfect for you.