Google hates manufactured backlinks and are usually able to tell when the author links their own work; so it is best to leave the backlinking to happen naturally when others link to you.
With the frequent algorithm changes the best advice I can give improve page rank is to comply with the latest suggestions from Google:
-write in a conversational style
-answer the question to your article quickly so that readers do not scroll beneath the fold
-frequently update your article by correcting errors, adding fresh info or changing around stuff
-write on topics which are not substantially covered online so that you will get pushed up the ranks for unique content
-proper title with good keywords
-forget SEO tricks and write naturally
What I am trying to say is that once your article meets the quality standard set by Google you need not worry about it. Let Google take care of the rest. People who find your article useful will link to it.