Google Page rank is based on back links. Back links are Links pointing to your website from another website. The more back links you have the higher your PR will be.
1) Join forums, forums are a great way to achieve links to your website. In most forums you are allowed to have a signature and in your signature you can put a link to your website.
2) Submit to search engine directories. Search engine directories are a good way to get a free link to your website. They also increase your chances at being listed higher on popular search engines like Google, and overture.
3)Using ezine ads (or newsletters). Creating an ezine will probably be the most beneficial step you can take to increasing your web presence. When you create an ezine you will be able to keep visitors coming back to your website for more by using signatures and giving special deals.
4)Creating and publishing articles. Articles are an easy source of generating new traffic. You can include your signature in your article.
5) Links from related websites. Gaining links from related websites can be one of the most frustrating tasks you can attempt.
They are very easy to find, but can be somewhat difficult to obtain links from.
6)

Page rank depends at your activity, Do only quality and unique work. If you crates quality links and backlink were improve then your Site PR increase.

There are some qualtity works:
Blog comment
Forum Posting
Article Posting
Press Release Posting

Use Original and Quality content in your On page.
And use in the submission work, Which helps to improve your page rank.

Keep adding quality content to your site besides obtaining do follow links from high page rank sites.

Maintaining a company�s blog has become universal now and it helps to increase traffic to your website. Extravagant results in affordable rates make Search engine optimization more popular. SEO services comprise use of latest technology to make your website a unique one and make it stand out from the rest. While using SEO Services you can have two options for the promotion of your website and they are on page SEO and off page SEO.

One more thing you can sort out, along with constructing pr zero links is attempt to acquire links with advanced PR and smallest OBL's and you may perceive an upsurge in PR.

get high pr back link as much as you can

It is a good approach to gain links from high PR sites. Sites that have minimum OBL is always an appropriate choice. There remains possibility that you can expect PR in next update.

nice post...good one

Keep getting more quality & relevant backlinks & updating quality content. This will help you to increase page rank

backlink, ana create high quality backlinks is important

You need to create quality backlinks structures and add content in the website. This two things are helps to increase website page rank.

When you get more no of quality and natural back links from different websites then you gain very good page rank

PR solely depends on your backlinks. So, try and get backlinks from other high pr sites.

Back links are very important to the website. directory submission, blog posting are the two major things in back link generation. These are used to increase your page rank.