I just did a survey on Valued Opinion that took me 15 minutes to complete, and I got paid $3.50. I wish they were all that easy. It was a Consumer Checkbook survey that asked if I could review my practitioners, and them it gave a list of practitioners, including chiropractors, primary care physicians, massage therapists, podiatrists, and psychologists. Consumer Checkbook publishes a newsletter/magazine, where people rate things such as auto mechanics, dentists, plumbers, etc. It is kind of like Angie's List. They are in Chicago, and I think a few other cities.