Ask friends or relatives who have done paid surveys before and sign up to those sites. With these online surveys reputation is everything. The next thing to do is use any search engine to find good surveys. These will usually be listed near the top of the results page. If you can’t find any great survey sites then look for popular survey directories. These basically serve as databases for surveys. Here you will be able to browse hundreds of different surveys and companies. Some even allow you to sign up, and they will email you when a survey in your category arrives.
Remember, before signing up for anything make sure that they are legitimate.