PR isn't important... Ok guys. It was big in 2005 since then there have been >5,000 minor algorithm updates and over 5 major updates. Page Rank <-- GET OVER IT!
I'm ranking over 100 PR0 sites ahead of PR 4,5,6 etc. lol
Well to increase your PR then you need to have some good quality Dofollow links from sites that are relative and authentic. It won't happen overnight but you can be sure that it a step in the right direction.