David Wilson made a post over at Social Media Optimization (a blog I frequently visit now that AMWSO has started offering social media consulting services), talking about the approach used by one SEO for reputation management, I felt that many of the same principles can be applied to affiliate marketing toward dominating the search results for a particular niche. Why be satisfied with simply achieving a high search engine placement for particular keywords. Why not aim for owning 5, or 10 slots, and target that consumer from many angles to definitely make a purchase through your affiliate links.
If you have a site or page targeted toward particular key words within a niche, do you have a Squidoo page to compliment your main landing page? Have you set-up a blog on a different domain, or a blog hosting service? How about a Myspace page, or Hubpage, or Wetpaint Wiki orPBWiki?
Build up some support pages, interlink them, and dominate the search results in a particular niche.