Recently I read a couple of different people writing about developing niche sites and the topics the choose to go after...And I had one of those "aha!" moments.

I'm sure many of you already knew this, but I'm also sure that some of us here also didn't think about it.

ONLY WRITE ABOUT THINGS THAT ARE BOUGHT AND SOLD!

Instead of writing about "dog training", write about "dog training collars", "dog training videos", etc.

Don't write about "golf", write about "gold clubs", "golf balls", etc.

And only write about things that are bought and sold that have affiliate programs.

Here's an example of a web page using this method about "dog training":

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Intro containing general info about dog training

Paragraph about a dog training collar available at Amazon w/affiliate link

Paragraph about a dog training ebook from Clickbank w/affiliate link

Paragraph about another dog training product available at Amazon w/affiliate link

Conclusion
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What we've done is kill two birds with one stone...We need content (words), so why not write about things we can sell? This gives us content as well as an additional revenue streams (with Adsense being the other).

While Amazon doesn't pay great, it does give you tons and tons of options. And, you can always look for high priced products to get a bigger affiliate payout.

What Amazon does give you is tons and tons of content, with an included revenue stream. Just take their descriptions and rewrite them a little so it is "unique".

Be careful with reviews, as the FTC is cracking down on fake reviews. Instead, post the facts about the product. Don't give a "review" unless you have actually tried the product.

And you should give disclosure about being paid in some way. Be creative and write something like, "These are on my wish list...I'll make a little from each sale so I may be able to buy them myself some day".

Try to work your "buying" keywords into the intro and conclusion paragraphs. Here's a list:
http://www.dombom.com/cgi-bin/dcforum/dcboard.cgi?az=show_thread&om=177&forum=DCForumID42

Also use as many other keywords on your list as possible. I don't believe in focusing on one keyword phrase. Every word on a page is a potential keyword, and the more "keywords", the more combinations they create, each of which can drive traffic.

You can also create chunks using these...But be careful. Affiliate IDs are fingerprints that let the engines ID that the page belongs to you.

If you're doing chunks, sometimes use affiliate links, but mostly do not. Another alternative is to have multiple accounts. This is easy at Clickbank.

You can also use multiple affiliate programs.

However, the more you use, the more likely it is you will leave a fingerprint.

I would suggest using no affiliate IDs for tin sites, which will be the majority of your sites.

Use "secondary" affiliate programs and IDs for silver sites.

Save your best few affiliate programs for your real money/gold sites.

You can even set up a entirely separate network, using no affiliate IDs AT ALL in common with your first network of sites, and use nothing but "affiliate chunks". This would have the highest payoff, but also be the biggest risk.

It's OK to take risks, just put in some thought beforehand and "insulate" the high risk network from your more valuable assets. Try this in a new niche so you aren't tempted to link resources, again using totally different affiliate programs.