Hi Friends,
You may increase the quality back links with the help of some guide lines....
Like: Back links must be Theme based and anchor text of your link must be a keyword.
You should exchange links of your website with high Page Rank websites
place your website link on that web page that should have less than 45 outbound links. A web page having more than 100 outbound links may be considered as link farm, link spam by the search engines and if you place the link on that website, you may not get the benefit as you are required.
thanks
Ganguli Singh