just build quality back link and for doing this you have to use off-page work like : Article submission, book marking,forums posting, yahoo answering and etc............
The Google PR update is may be near. So, before the update, just build as much HIGH PR links you can for your blogs. You will surely get PR for your websites for the next update. Kind regards, Yogesh
I agree, page rank is mainly about links. Other pages linking to you, but its not just a sheer volume of links. Google looks at the quality of those links as well. Links from high PR pages will give you more "juice". With that said, no link is a bad link, unless it is from a spammy website.
High PR incoming links is a known way of improving PR. That being said, PR alone is not something to worry about. Just keep working on site (content/backlinks/traffic).
You should doing forum posting in high pr do follow sites. Blog comment posting is the second option for you.