Ok, this is a bit of a sensational chapter title, and just like The 4-Hour Work Week isn't a literal guide to a four-hour work week but rather a guide to move you in that direction, this chapter's goal is to show you a technique that will move you in that direction.
Even so, this technique did literally yield a bump of $1,000/month for me with just a few minutes of work. So, I hope you can use it to your advantage, as well.
I used Adsense to accomplish this, but in theory, any CPC ad network can yield the same results.
Start by going to your top 10 most trafficked articles and see who's showing up as advertisers. You may want to refresh the page a few times to see if different advertisers show up.
As you can tell from this image, taxrates.com seems to be paying for advertising with Google on my site. What we now want to do is go over to their site.
Of course, don't click the ad since that's click fraud. Just type it into your browser window.
Now look around and see if the site has an affiliate program. Oftentimes, sites have links to the affiliate program at the bottom of the page. If you don't find one, send an email to ask whether they have one.
My biggest success with this method was from one of my highly trafficked pages. It was a small company that was extremely relevant to the post, and it did have an affiliate program. So I signed up, added an affiliate link to the post, and immediately started earning about $1,000/month just from those few minutes of work.