Become a moving advertisement. “Wrap” your car in an advertisement, go about your usual commute, and get paid monthly to do it. (Some car-wrappers in San Francisco make as much as $400 a month doing this, but of course this varies depending on how big a city you live in and when / how often you make your commute.) You can also get paid to wear a company’s logo t-shirt around (particularly if you wear it someplace conspicuous, like at your school; see ShirtsInSchools.com as one example).
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.