Pinecone Research. This is one of my favorite survey companies. They pay $3.00 per completed survey and will pay you by check or paypal. I usually get a check within a week of completing a survey. I do about a survey a week for them. The only downfall to this company is that you have to be invited to their company. You can't just sign up for them you have to get an invitation from them or wait until they have an open registration time. If you get a chance to sign up with them jump on it. The surveys are easy and fun to do. They will even send you products to evaluate for them.
Opinion Outpost. This is my second favorite research company. They work by giving you points per completed survey. The surveys points will be dependent on how long the survey is. You will always earn Opinion Points for each survey you complete. Opinion Points are redeemable for cash, gift cards, and gift codes. 10 Opinion Points = $1.00. In addition, some surveys may offer other payments, such as a sweepstakes or other prizes. Each survey invitation will have details about the Opinion Points possible as well as other reward details. I just started this survey company this month and have already accumulated enough points to get $14.20 (you have to cash out in $5.00 increments).
You can go here to sign up for Opinion Outpost their surveys are easy and fun to do also.
MySurvey.com. This is my third favorite survey company. It is another survey site that you get points for each survey you complete. You can use those points to get cash, prizes or donate. Again, it depends on the survey, each survey has different amounts of points allocated to it. Do the little mini surveys so you can qualify for even more surveys.