A friend of mine got a PR4 for his site absolutely without any link building. No inbound link. Just one article on homepage. That's it. That's all. No promotion. And Google gave him PR4. Sometimes we think PR system is unfair.
The only way to imrpove your PR is keep on building quality link. Dofollow blog commenting and Use google Adwords.
It really comes down to quality (and a little time). Provide good content and links will grow naturally. Provide good substance on relevant blogs and forums, and link back to your site. The engines WANT to index your site, as long as the content is relevant. Stay away from link farms or bad neighborhoods. Thanks. Prepaidseo.com
quality backlinks from higher pr site is the magic to gain pr fast. so start making backlinks from high pr sites.
Tracking the site of your adversary, find out who linked to his site, and then you writer exchange link letter to them.
There is a software can be used to click on your website,it can improve your website's traffic, but I forgot it's name, you can look up on google .
You should just wait and built backlinks Usualy even a few backlinks will bring your page rank to 3 or 4 in some months
The whole PR increase rhetoric that most people say like "backlink with so and so site will get you a PR of X" is mostly full of it. Just to get up to a PR 3 or 4 usually takes a lot of work. Anything above that takes even more work. There is a reason a lot of people sell PR E-books, people buy them dreaming of going up, but if everyone is magically going up, why are there so many threads asking? And why can't most people get up there? If a lot of ebooks cover a certain topic, chances are, it is a scam.