When I started blogging 1 year ago...I knew nothing like PR and stuff. By the time I came to know all this and realized that my PR was 0(that was in May 2009), I left blogging for quite some time. Now ever since I have started blogging again, I find my PR has gone upto 4.
What I'll suggest you is that you do the following to increase your PR -
1. Leave good and reputative comments on other blogs that are probably in the same category as your blog.
2. Social bookmarking is a must.
3. Include your blog links in your signature on various forums.
4. Add other blogs from your same category to your blog roll.
5. Follow other blogs and stuff on twitter and they might start following your blog too.
6. Common Sense - Write good posts.
Rest is all in your hands. Have a nice time blogging! 