When you sign up with Synovate, they will send you surveys for products that you use regularly, or about new products before they come out. They will pay you for completing surveys, as well as send you products to try for yourself and review! Go to Synovate and sign up!
There are also other companies that are similar. I have read about many, and these seem to be the most rewarding as far as cash and prizes. If you are signing up for these (which could give you a little spending money for a small time investment), I suggest not using your main email address. If you recevie lots of surveys, it could fill up your inbox pretty quick.
Here are some other PAID Internet Survey Companies~
Mindfield Internet Panels-They pay for your opinions on different products
Panda Research-Pay $3-$75 per survey completed
Inbox Pays-You get paid $5 for completing surveys
Here are Survey Sites where you are awarded with Prizes for your opinions~
Opinion Surveys-share your opinions and earn rewards
My Survey 2011– Take surveys, and earn rewards
e-Poll-Take surveys, earn rewards, and win cash!
Survey Spot-rewards for surveys
Let me know if you joined any good ones that I missed!