How Can I Increase My Blog PR?

If that's your question, well i'll try to answer it. In WTF kind of way...

Blog on a topic that people care about and hopefully they'll link to you. Or blog on a topic that no one is talking about, won't effect your page rank necessarily, but you'll appear high up in searches.

You can improve your page rankings by using search engine optimization, search engine marketing and search media or social media optimization techniques.

So build at least 100 quality backlinks for your site from sites with high
page rank and watch your rankings going up.

Yep, as earlier said getting 100 quality reciprocal backlinks, then if ur's is a blog then upload unique content regularly.. then your blog PR will increase with in next updation...

Yep - PR is based on your internal linking on your blog, how often you have fresh content, and the number of high-quality links pointing to your blog.

The best thing you can probably do is build backlinks, as blogs typically already have good internal linking structure.

If you can get a link from a high page rank site, it will help your site's rank dramatically

The most obvious tips are to write quality content.
Search some keywords for your topics and utilize them in your posts.
Promote your blog on social networks such as Facebook and Twitter.

Hire a seo company, this is if you got extra $$ in your pocket., try jump2top.com

Well, that's all for now...
Got more idea on how to..?