I've experienced with several ideas and opportunities so I will briefly address each opportunity I have tried in a brief summary. These are merely my opinions of the programs I have tried. The last one listed it the one I recommend and that is epinions.com.

Paid to read e-mails.

This seems like the biggest money making scheme out there. Try this out at your own risk. I made around $70 in a years time so it is definitely not worth it. I also was part of some programs that went under fairly quickly. I was going to get $100 from one program right when they closed shop and nobody that I know of received a dime. I thought it was because of dishonest tactics by the program administrator. There are several programs out there that will drop users and claim they violated the terms of service when in reality they did not. This is to eliminate several users that would have drawn a big check. The program administrators will also change the terms of service any time they feel like it, this include minimum payout amount. Also some programs with a minimum payout of $100 are completely fradulent and no one has ever made that much money. Another problem I experienced was when one website changed hands, every user's account was reduced to $). The new buyer said that the old administrator was responsible for the payouts, not him. So be very careful before joining a program.

Paid to surf.

There are the same problems here as there are with the pay to read e-mails with one addition problem. The surfers themselves are very good at deceiving the system and there is really no way to counter the hackers out there. In my opinion the only real way to earn with this program is to cheat so it's not worth joining unless you are a dishonest person.

Paid to take surveys.

This is actually a pretty good program. I have made around $50 in the past year with this program and with a minimal amount of investment. I only participate in 3 programs but there are literally 100's out there with varying levels of compensation for those of you that do not have a life (it must be nice.) I think these are worth the risk and if you do not receive some sort of compensation within 3 months then dump it and move on.

Paid to shop.

I think this is a rip off because you have to spend money to make money. And you almost always spend more then you will make. If you decide not to spend money and only join free offers then you can expect a long wait to see something in the mail.

Get paid to advertise on your car. From my understanding this is very difficult to get a piece of. If you own a unique vehicle or a brand new model, plus you drive a lot and park in a busy area, then you may get to join. If not then don't hold your breath. The only one I know of is www.ad-wraps.com
Btw, if someone is charging you money to register then pass. It's a scam to get your money for something you could do for free.

Memolink

I've earned $20 bucks off this site but I do not recommend it. It just takes too much work to make any real money on the site. Plus many times you have to buy stuff to get points and that just doesn't make sense if you were trying to make money.

epinions.com

This is the only program I can recommend. Although I have made more money from this program then the other ones, you will still not make much money out of it. It should be approached as a hobby, something fun, rather than a money making opportunity. But if you know what products to write for then it can be a nice little income for you every month. It will take you a few months for you to earn an acceptable income but you make residual income on all your reviews, not just the reviews you wrote in a given month. My user name is yakkowarner and you can find my page here

Xango has been a disappointment and I can't recommend them for money, but their product worked for me.