It is big achivement if get the high page rank to site, so I want to know how can I develop the page ranking
Increase the external links [use forums, yahoo answers, social networks, blogs, go to others blog and keep comments with your URL] Be patient and keep going with your content and do something new to world.
Get backlinks from quality sites.Or fill your site with information-rich content and let other sites link to you.
Just keep the good content going on and page rank will come and it happened to me. My sap abap is of one year old and its page rank is 4 and i didn't done any thing other than keep posting quality content. All the best.
To get a good PR, get lots of backlinks. Try to get back links from high PR pages. Anyway, I suggest you open this tried in the google section.
you should get at least pr4 back links, it is better to get more pr5 back links. write related fresh contents often.