Create unique contents and get lot backlinks to get high pr.

High PR backlinks can be generated through forums & articles sites if they are put in most relevant category. There sites where you are submitting the links should be do-follow.

There is only to do that is you must create your backlinks on high PR, DA websites. There are a lot of high PR, DA out there, you just try and add them to your collection.

Social media such as Google+, Pinterest, Tumblr, Digg, Delicious, Youtube are the best source to derive traffic and with high PR authority.

To create high PR back links are
Forum posting
Blog commenting
Posting classifieds sites.

Top 10 DoFollow High PR Article Submission Sites For Backlinks :
* http://www.squidoo.com/
* http://hubpages.com/
* http://ezinearticles.com/
* http://www.gather.com/
* http://www.selfgrowth.com/
* http://goarticles.com/
* http://www.brighthub.com/
* http://www.articlesbase.com/
* http://www.articlecity.com/
* http://www.sooperarticles.com/

High pr links can be built using blog commenting and forum posting... I say blogs where commenting is done have good pr, you should contribute to the blog for better result...

go to some high PR page and put backlinks to your site there, you can use tool to check whether that page has high PR or not