I would say definately Pinecone is one of the best. The only thing is with Pinecone you have to find a banner in order to sign up with them.
Some of these you will get points, entries into sweeps. for cash and some cash for doing surveys. Go to the list of survey sites link in my above post and sign up for as many as you can. The more you do, the better your chances of making money are. I just put $200 in the bank on Fri. One was for $70 that I cashed in for my son from kidzeye, one was a $10 win from being entered into a sweeps. for doing a survye, many were from Pinecone and there were a few others that I got paid for testing products or doing surveys for. It takes months to get that amount of money but every dollar helps.
acop.com (American Consumer Opinion Panel)
buzzback.com
i-say.com
lightspeedpanel.com
npdor.com
surveyspot.com
partnership-plus.com (enter your monthly clothing purchases) This one usually earns $60 per year.