In order to improve search engine rankings, you always must have good linking techniques, but the truth is I am finding through tests that keyphrases with in the text of your own pages are very helpful. The who top search engine placement gig and the google patent is about theme related links and content.

Increase Search Engine Rankings with Internal Links 

When improving web site ranking you are simply trying to improve the page rank symbol on your website. In order to this you must borrow some from your partner. Hence "send me a link old chap!!"

This is fine, you can simply use articles to increase search engine rankings. But what is interesting to find out is the structure to use within your web site helps a ton. Discover how the google page rank patent gave some insight to improve search engine placement. 

The article discusses the methods of themes and how to improve search engine rankings using link structure with in the site as well as off site. For more information on how to improve search engine rankings, view the article section.