Get backlinks by using Social bookmarking

Social bookmark websites are an easy way to get backlinks that will increase your PR.
It's especially true with some sites like Netvouz or Mister-Wong. You can almost be sure that the links you add to those two bookmarking sites will be noticed by Google. :)
I definitely advise to open an account with them as it's free. So you may get easy backlinks!

List of Social Bookmark sites (by decreasing effectiveness for SEO):

Mixx

Propeller

digg

LeftHit

Netvouz

Mister Wong

Stumble Upon

BlueDot

Blogmark

del.icio.us

ma.gno.lia

LinkArena