Here's a strategy I "borrowed" from Chad Kimball. I summarized the video and made it a little simpler. You can check out his entire video here::
http://arborgroup.org/MetaFilterTrick/

Sign up for the site Metafilter.com. Note: It costs $5 to join.

When you sign up, use a user name that is completely unique and that you have never used for any other resource. This is because it is against Metafilter's rules to link to your own resources.

Go to http://www.seochat.com/seo-tools/pagerank-search/ , which is a SE that pulls Google results and also returns the pages' PageRank.

For the search parameters, check "sort by PR" and choose to return 100 results

Enter this search query EXACTLY as it's written, except add your keywords:
site:ask.metafilter.com +"keywords" -"this thread is closed"

Ask Metafiler is a site like Yahoo Questions, where you answer questions other folks post, but unlike Yahoo, Metafilter doesn't use the nofollow tag.

Pay attention to the minus sign, which tells the search to NOT include pages where comments aren't accepted:
-"this thread is closed"

You should find a bunch of threads at Metafilter where you can post responses that are related to your topic, all sorted by PR.

Create a quality response and include a link to an relevant article, lens/hubpage, etc. Make sure you only link to resources directly related to the page you post on and content good, decent content, as Metafilter is policed very heavily by real people. You won't get away with spam, so don't waste your time.