It’s more important that you are ranking high with certain keywords than what your PR is. There are many websites that have lower PR and still are listing number one for certain keywords.
But if you are really worried and want high Page Rank, try the following:
1) fresh content like no other page out there on the internet. More you have, the better.
2) link other sites to that page(s), the more the better, they can be inbound or external links from other sites.
3) use a blog for faster indexing of those pages when a link is placed on your blog to your new content.
4) submit to article directories and place the link of the pages you want a higher PR on.
5) once your other pages have higher PR, strategically place other PR pages that link up to the new PR pages and force the PR ranking by using the term of revelance given from Page A to page B.