Developing and maintaining high quality links to your web site is essential to ranking high on search engines. Google ranks web pages based on the number and the quality of incoming links if more than one web page is optimized for the same keyword.
Here are a few tips for building quality links:
1) So get listed on respected directories such as dmoz.org or Google Maps.
2) Issue quality press releases to get online publications to cover your story and link to your site.
3) Post blog comments with a user profile that also contains a link to your site.