Selling blood plasma has been a favorite moneymaker for as long as it has been around. It's pretty easy, but it can be time consuming so the pay per hour isn't all that great. Still, if you need some quick cash you can't really beat it.

The first time you go in to the donation center they will give you a quick medical exam and ask you a bunch of questions about whether or not you are a junkie or if you engage in dangerous sex practices and stuff like that. Obviously they don't want to give anyone AIDS or some other disease so this questioning is a necessary, albeit time consuming, evil.

Once you are approved, you sit around for an eternity until it is your turn. When they finally call you, they have sit in a chair and then they stick you with a needle and drain some blood. Next, they process the blood to remove the plasma and when they are done with that, they put the leftovers back into you. Usually they have a TV for you to watch while this is all going on or you can bring a book too if you want.

Finally you will be done and they'll give you a check and away you go. When you return, you'll be able to get in a lot faster because you won't have to go through the medical exam again.

There are plasma donation centers all over the country and probably in every good sized city but if you can't find one, try searchng at DonatingPlasma.org.