Ye' old general discussion board. Basically, for everything that isn't covered elsewhere. Come here to shoot the breeze, shoot your mouth off, or whatever suits your fancy. This forum is not for asking programming related questions.
A friend of mine started http://www.dvdactive.com/ a few years ago. He now lives off the ad revenue .. doesn't have a proper job .. it's around $40,000/year I think.
It does work, maybe not to the extent you might think, but it does make extra cash which is useful for covering off on maintaining a website hosting account. I found Google Ads to be the most effective and least intrusive.
I find yahoo ads pay more than google... although their CPC is going down
Set Search Time - A google chrome extension. When you search only results from the past year (or set time period) are displayed. Helps tremendously when using new technologies to avoid outdated results.