Similar to writing reviews, you can become a freelance writer and make extra money writing articles and website copy. While you don't have to be a professional journalist to write for a website, it helps if you've blogged or had your own website where you blog regularly. Even better is showing that you have some experience in the niche in which you're trying to find a job.
@LauraGesicki I disagree Laura. Technology can only let an individual go so far with design. It all starts with the thought process and possessing the “designer eye.” This “eye” cannot be taught, but is rather a natural talent and ability to recognize good design from bad. Technology is merely a tool to display our ideas. Nothing beats natural talent and creativity.
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.