What do you mean? basically you search on Google for survey sites, sign up, fill out surveys and earn sod all...completely pointless way of trying to earn money.
Think how you can provide useful stuff in you niches through internet that will more worthy than your survey.
Surveys have become big business on the Internet. Companies are willing to pay people for their time and opinions on products and services. There are lots of sites out there and it is a great way to make some extra money too.
You can make money by answering surveys online. BUT, don't expect too much. You can check out Toluna and Swagbucks. But, as I said, don't expect too much.
Those are just two sites though. There are lots of other great sites out there too. By joining several sites you can create several income streams. I've always thought it's a good idea to have your eggs in as many baskets as possible.