Jeez...like, read a bit and use the search function before you re-post these questions OVER and OVER.
Do build link for the page which you need to increase Page Rank. Ideal way to build link for a page by Article Submission and Social bookmarking
Just get more and more backlinks for free, first by link exchanges or commenting on relevant blogs. Later start buying some good PR backlinks which will help you get your PR higher.
Drop links in niche-related forums directed to your site and over time you should then see your page(s) show up in search engines such as Google.
submit articles to the top directories and you will get high pr for your site and the article you submitted
These fellas mentioned the good techniques already, article submission + do follow sites + recip links. However social marketing is also a good strategy to master. Good luck on your ventures
If you need to work on the PR of your site then the main factors are structure of the site, content of the site, external linking of the site and popularity of the site. 1>>Structure is the main part, you need to work on it in such a way that your site is connected with each pages in logical ways. 2>>Content must be relevant to your page. 3>How many backlink you have 4>How many visits you are earning daily from different ips.
Building links is one of effective ways to increase PR of a site.Forum posts,social bookmarks and blog comments are good choices.