Google Adsense

Google adsense is by far the easiest source of creating revenue for your website. Click on the link to set up an account. You need a website or blog, obviously, to publish their advertisements. It's a pretty simple and self-explanatory setup and insert process. However, maximizing your adsense income is another matter. Also, there's enough free info out there, there is absolutely no need to EVER shell out any money for this info. Here are some excellent (FREE!) sites I've found helpful:

http://www.perfectadsense.com/google_adsense_maximize.htm

http://www.digital-photo-web.com/maximize-adsense-ctr.html

http://adsense-ctr-tips.blogspot.com/

Be sure to comment below if you know of other good resources.