Have lots opinions on what works and what doesn't on the web? Then you might just be right for a "career" in remote usability testing. Actually, no one really makes a career at it, but user testers can pick up some extra work reviewing websites or mobile applications that may still be in development. You don't even necessarily have to be very knowledgeable about the Internet because some developers want the beginner's point of view.
If you are a professional photographer, or have a real flair for photography, then selling your images on other sites could be an idea. This could be done alongside your own photography site, as it is a good way help get your work viewed by a wider audience. There are numerous stock image websites to contribute to, but choosing a popular high-end site like Shutterstock should ensure your photographs make you some money.
Websites like Survey Junkie will pay you a decent chunk of change for the low-maintenance, borderline mindless task of completing surveys. Companies want to understand consumers better, and one way they do that is by compensating survey-takers (a.k.a. you). Most surveys pay between $0.50 and $1.25, and many of them take less than 5 minutes to do. You can read our full Survey Junkie review for more info.