GPT (get paid to) / Paid Survey sites are an excellent way to earn free cash and prizes online. The sites customarily pay you via check, PayPal, or prizes for responding to surveys, completing trial offers, visiting web sponsor web sites, and other online activities. These sites also customarily will have some sort of referral system that will allow you to earn rewards from referring people to the site. Hint: Never pay for a list of these sites - Free information is available freely all over the web. Also, never pay to become a member of any of these sites - free paying sites are where the real money is at.