really if you do this stuff you will get high PR? lol.
There is some truth in what Ar3d said. Getting links to your site is EXACTLY how you get PR.
Your PR depends on how many links to you, how related those sites linking to you are to your own theme, how many links there are on the page that links to you, the PR of the page that links to you.
PR is not everything in determining your SERPs. It is still an important factor, but it is not the only one. Other than PR, important factors to consider are the anchor text used to link back to your site, as well as on page factors such as keywords on your title, h1, h2, h3 tags.
Submit to directories
Exchange links with RELATED sites
Do not link to banned sites and Link Farms
Post in forums with a link to your site in your signature
Optimize for the right keywords (use these keywords as the anchor text in your links)
Put quality content that other people will want to link to.