Here is a list of the best free to join and most reliable Paid Survey Sites:
Surveys are between 10 and 200 points, and 1000 points is $10. Points can be exchanged for money, gifts, raffle entries, or donated to charities. A good site for product testing opportunities.
Light Speed is a point based sight that offers many survey opportunities. Their points can be redeemed for cash or gift cards. They also enter you into sweepstakes for taking surveys and mini polls. Since they offer a lot of surveys, the points can add up quickly.
The American Consumer Opinion Panel is another good cash site. I find their surveys very interesting, and when you get a cash survey they promptly send you a check.
Opinion Outpost is a points for cash site, with a low payout. Payouts are at 50 points which is $5, and they give you 2 points even if you don't qualify for the survey.
EPoll is a great point site, especially if you like TV and movies. They often have you watch new TV shows and take surveys about them. The points they give are very good, and they can be exchanged for gift certificates to many large companies.
They pay entirely in cash, and their payout minimums are low. All the surveys I have taken have been for $10 -$30.
They send out a few surveys a week, most surveys you qualify for are between 50 and 150 points, and you can redeem at 1000 points which is $50. They also offer unique programs such as year long discussion panels.
Survey Spot offers sweepstakes and cash rewards for completing surveys. Their cash surveys range from $2 to $10 so far, and their payout is only $5.