I have recently become a Bzz agent, what is that? It is a supercool program that lets you review products on your blog, FaceBook Page, Twitter and many other ways. It is free to join and you get to try a ton of great products for free. They award you points for your activities that you can redeem for some great prizes so its a win win deal. You get free products, share your opinion and win great prizes. So go to http://www.bzzagent.com and start creating a bzzzz.
Other sites where you can share your opinion for prizes and for some money also let you join for free and have great referral programs. There are too many too count but these are some of my faves: