If you have any sort of website at all, you can make anywhere from a few dollars to a few THOUSAND dollars or more every month by utilizing one simple program - Google Adsense! Adsense code basically allows you to pop an ad on your website that is of interest to your readers. For instance, if your website is about cooking, then Adsense will show ads of interest to cooks!
I've had great success with Adsense and highly recommend it as an extra income. If you have a website already, you might as well monetize it with Adsense! Do any of you already use it? What have YOUR experiences been?