Recently a client asked me why we are recommending they create a blog, a Wikipedia page, a Google Knol, and a YouTube channel with videos. They couldn't understand what one had to do with the other. We often refer to the combination of these tactics as Reputation Management. And while we find it essential to control as much of the search engine results page (SERP) for a client for messaging reasons, we also like the fact that it just plain allows an opportunity to own as much of the real estate on a SERP as possible.
But since most search engines only allow up to 2 links from a single domain, you must create optimized presence in a variety of domains in order to do that. With strategic website choices (like those I mentioned above) and appropriate tagging and optimization, a client can achieve many slots in a SERP, even for competitive phrases. If done well, a client can potentially own all 10 first page results.
