Sell blood or donate plasma. Plasma is a component of blood, and the process of extracting it is similar to donating blood: your blood is drawn, the plasma is separated, and the red blood cells are returned to your body. Laws may not technically permit you to sell your plasma, but you can be compensated for your time spent donating. In the United States, you can make about $200 a month by registering with a plasma center near you.
Websites like Care.com connect parents with babysitters. The company does all the background checking and other due diligence to put parents' minds at ease. Of course, you can appeal directly to people in your personal network, but if you're looking to generate recurring revenue sign up with a site marketing to parents looking for child care services.
What Employees Say: “VIPKID pays between $14-22 an hour, plus more in incentives some months. Most kids are fun and well behaved. You create your own schedule and work as little or much as you want. The materials are already provided, you just have to review them beforehand and plan out how you want to teach the materials and which props you want to use.” —Current ESL Teacher