To find surveys that you can do, you should start by searching on search engines. Many opportunities in this field can be found on the internet. There are countless job portals that you should go through to find surveys.
You should also visit websites that belong to local staffing agencies. You can find help from such organizations. Some deal with online jobs specifically and they could point you in the right direction.
You should be careful when looking for online survey jobs. Enough research will enable you to avoid scams on the internet. Choose surveys you are sure are legitimate and also related to information that you know. You can supplement your income by signing up with different companies that offer surveys.