The point of each survey is to present you with a topic you're interested in and qualified to discuss for the benefit of the researcher. Surveys range in time required, from very short to quite long. Because researchers are looking for opinions only from certain segments of people, you may find you have to try a few surveys before you're qualified to give your opinion on one. Keep at it, and you'll eventually find one that's right up your alley.
Survey Junkie makes it quick and easy to jump into the survey game. According to their websites, they say they are the “most popular spot online to earn cash and rewards for sharing your thoughts,” while that might not be technically true, they are one of the largest survey sites out there. They were launched all the way back in 2005 (which is pretty old for a survey site) and they have over 4,000,000 members.
I also have used Synovate Global Opinion Panels, which is now I-Say by Ipsos. They send you surveys pretty frequently and the points you accumulate can turn into actual money! You can receive an actual check from them, or choose to redeem for a gift card. I haven’t cashed out with them since they changed into the new system, just because I’ve really stopped taking the surveys because I’m lazy 🙂 Here’s the link: http://i-say.com/Rewards/RewardsProgram/tabid/203/language/en-US/Default.aspx