Affiliate marketing is a very popular practice on the Internet. In this system, you have a merchant who wishes to see other people (affiliates) sell directly or indirectly, their goods and services in exchange for a commission. Sometimes this type of advertising is also called CPA (cost per action) or CPL (cost lead) based.
Affiliates can send potential customers to the Merchant using multiple tools from banners to text links and reviews.
In order to find a suitable affiliate program you can turn to individual companies and publishers like Dreamhost and SEOBook, or enter into partnership and networking markets.
List of popular affiliate markets and networks:
* Commission Junction
* ClickBank
* Azoogle Ads
* Link Share