Build a link wheel and high rank on search engines.

Main Site
/\
Article(keyword 1) article(keyword 1)
/\…………………………../\
web 2.0(keyword 2) web 2.0(keyword 3)

Write some articles and research the best keywords.
Bookmark the article link another good keyword.
Submit your social bookmark feeds to feed sites.

This way your link wheel will expand by itself.