well here's the big news, they hardly ever work. You aren't going to make $2000 dollars an hour (chance's are big company executives don't even make that)
the sites below are ones that I have found and joined that are all proving their worth, they aren't going to earn you large amounts straight away but with persistance it will pay off. I now also run a mutual referral scheme, if you join one of the programme's below and let me know which one I will happily sign up for one of the programs that you are using as ur referral, a win win situation
My Lot Discussion Pages - An online discussion forum that pays you for posting new discussions, responses to existing discussions, uploading photo's and the obligatory referrals. Has a low payout figure of $10 so is relatively easy to reach.
Cashcrate - Get paid to complete offers and free trials. Offer's a daily survey which pays $0.80 per day and additional surveys and trials as well. Have seen evidence of people earning in excess of $100 per month no problem at all. Also has a low payout of $10 per month and an active referral programme.
Crack The MySpace Code - You Can Make Money With Social Networks!
Slash My Search - A search engine that pays you for surfing the web, has an extremely good referral package too
Adbux Pay to Read - Another Pay to read site
Clixsense Pay to Read - Another Pay to read site
Cash Money Email - another site that emails offers to you and simply requires you to click on the link and let the page load. Comes in both Monetary and Points values (points are converted to money at the end of each month) has quite a high payout at $50 but does give you a $10 bonus for signing up. Also has the referrals programme active.
Blue Bay Pay to Read - Sends you several emails each day and all you are required to do yet again is click the link and allow the page to load. Offers payout at $3 and also has a referral's scheme.
As i said, none of these are going to get you rich overnight, but given time and patience they will begin to pay out for you.