One of the best ways to increase your PageRank is to have incoming links from high PR webpages. While it may sound simplistic getting incoming links isn’t an easy task, let alone getting incoming links from high PR webpages.
Why would anyone with a PR7 link a PR1 page? Content.
This may not be a major enlightenment but if you look around Yahoo! has a lot of high PR pages in its directory. For example the Web Page Design and Layout has a PR6 and it’s not very hard to get listed there if your website has something to do with webdesign and such.
You want to find a matching category and click on the Suggest A Site link at the bottom of the page. Give it a few weeks and if Yahoo! finds your page relevant and useful they might just give you that high PR incoming link, for free.
JErmExpress.com has a PR5 and I think most of it is because I’m listed by Yahoo!