How can I improve my PageRank?

Get better backlinks, you can order (or create by your own) link pyramids, link wheels, etc to improve your pagerank.
I will recommend you to check out boostsuite, they, check your website and tell you how to improve it.

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Best Regards
Hovik Aleqyan

Build backlinks to your website from other websites with Good PR. It wont happen straight away, but you will see it increase over time.

Hello,If you want to improve your page Rank in google you need to Get high quality backlink to your site,If you bought it your page rank will be increase soon.

You need to work on content creation and link building, consequently you have to increase visitors too, your page rank will automatically be increased...

If you are building links on relevant sites and high page rank site, it will be good for increasing page rank of your website.

I just had a look at bootsuite; frankly that looks ridiculous. It's just a joke!

one can improve page rank by bookmarking , forum posting, blog commenting.

Throw a few, RELEVANT, backlinks at your site, and then sit back and ask yourself why you're worrying about your PR when you should really be more concerned about your SERP. That's where the money is.

I guess, there's no other way but get backlinks for high PR valued sites.

My first step for the improvement of the Page Rank is the uploading of new contents. It should be well written and unique which should not be copied from another source in the internet. Also, it should be directly related to the niche of your site. When uploading, tag it with the proper keyword. Depending on the length and quality of your content, your Page Rank will change.