Increasing Your PR (Page Rank)

Hey, does someone know how can I increase (or get ANY) PR?
I mean like PR1-2-3 not higher..

How do you guys get PR?
I know the thing is to get links from pages with PR already, but how do you do that?

BTW, I only care for the PR, the ranking does not matter to me. (if there's some spammy way or anything..)

Thanks!