I have created a site on blogspot. So, I want Know how Increase PR of my site: http://seoservicenoida.blogspot.com/
it's strange you have an seo services website including link building packages and you are 'a leading online marketing company established in 2003' and you are asking how to increase PR!!
Building backlinks, that's from good page rank sites, but it's even better if the backlink comes from a page filled with keywords related to your niche.
Its really strange, but if you want to do increase PR then, you have to do Regularly submission in High PR Sites also do Link Building Services.
well if you want to have a better rankings you should follow google webmaster guidelines.. specially in number of links, canonical, structure of links, quality content and traffic.. these are all the basic of PR factors. here I'm sure this could help you more about pr. http://www.seomoz.org/article/search-ranking-factors & http://www.vaughns-1-pagers.com/internet/google-ranking-factors.htm
Backlinks is base of the SEO rules that will not change anytime !I offer visit here too : http://indexhttp.com/2011/11/20/special-seo-service/
Manual social bookmarking is a good idea. Basically just getting your link out their with your keyword anchor texts. PR can flucatuate in new websites too so dont get too exicted if it rises early on
Go for and preform RSS along with Web directory submissions of your website, they surely would be helping you a lot in increasing the number of visitors to your website along with increasing the PR as well.....