Vindale
I love this site. Vindale Research allows its members to participate in up to 10 studys per day, with each one paying $1.50. Vindale is one of the higher paying research sites.

• How to make money with Vindale.
  
  Paid Surveys - Receive email notifications each week about new opportunities to earn up to $75 for evaluating a product.
• Online Studies - Receive email notifications every few days about new chances to earn $1 for completing a simple online survey.
• Reward Mail - Get paid to read your email! Reward Mail features promotional messages from a variety of advertisers, and you will get paid just for reading the email and clicking on the link to visit the sponsor's website and checking it out. It's that easy!
• Opinion Polls - Receive fun opinion polls in your Inbox a few times each week and earn 25¢ every time you share your opinion.
• Member Newsletter - Stay informed. Every two weeks you'll receive an email about your account balance, new opportunities and bonus offers.
• You can also earn $5 for each person you refer that meets the requirements.

*Upon registration one must complete the three part introduction and a few required surveys before  
  progressing further. After completion of required surveys, you will have more surveys available to you.

• Intersted in Vindale? Click here to to register.
• *Only one person per household can participate.