This looks like spam, I know. But I've tried several different schemes over the last I-Don't-Know-How-Many years, and I've found two of them that work. Both of them are getting paid for targeted advertising. They're by no means quick money, but considering they take about 3 minutes out of your day each day, and then eventually give you real cash, that's not such a bad deal. Here they are:
PureProfile: You fill out a profile, then go to the site each day to read messages. You can setup notificiation preferences if you want to email you when there's stuff to read.
EmailCash: This has been the most lucrative for me thus far. They email you, and you click on the link in the email to indicate you've read it. You get 5 points. 1 point = 1 cent. You can get a cheque at $30 or $100, and I've had several $30 cheques and am now well on my way to a $100 one. Just for reading emails. Not bad really.
Now my wife, on the other hand, came to me quite a while ago now and asked for some money (I think it was $65 from memory) to sign up with a crowd who would hand your name around to market research companies. She has made hundreds of dollars out of it, for very little effort.
Just thought some of you might be interested. Just btw, the links above give me bonuses if you sign up using them. ;)
STATIC DISCLAIMER: All the stuff in here is purely my opinions, and they tend to change depending on what mood I'm in. If you're going to get bitter if I say something about you that you don't like, then maybe don't read. I avoid using names as much as possible, and would request that people who know me do the same in their comments. Basically, I often vent my frustrations on here, so if you happen to be someone who frustrates me, expect to read a description of someone very much like you in here!