Just thought I would pass along some tips for making the best possible survey experience and making sure you qualify to get paid for it
1)Answer everything honestly, you will get caught if you lie.
2)Take time and read every question, if you go too fast, you will be disqualified. It may be tempting to rush through the survey if you have things to do, but the faster you go, the more chance you have of not getting paid.
3)PAY ATTENTION! I know surveys can be long and boring, but some survey companies place trick questions to see if you really are paying attention. If you don't answer a 'test question' correctly, you will be disqualified and may get booted from the survey company.
4)Answer all quickie surveys that get sent out, even if there is no payment for it (only sweepstakes entries). Answering the quick surveys helps you get qualified for future surveys that will pay you.
5)Be patient for payments, a lot of survey companies only pay by check and it can take anywhere from 2-6 weeks to receive your money.
6)Sign up for paypal! There are survey companies that by with this method and it usually only takes a couple days to receive payment. You can then request a transfer to your bank account, or spend it on ebay or other websites that take paypal.
7)Do product testing! It's been mentioned in this thread, it's free products and payments are very generous. I'm about to embark on a 9 month product test where i will get paid $100 at the end.