It has been said many times by many people, but I want to reiterate - writing and syndicating articles is an excellent way to obtain easy, one-way backlinks. I recently wrote a fluff article (meaning a non-technical, simple article aimed at the average joe), and submitted it to two article submission sites (goarticles.com and ideamarketers.com). Within a week, Yahoo! was showing over 30 new backlinks from people using the article. I did not put the actual article on my site, because I wanted to avoid any kind of duplicate content problem. There are lots more article syndication sites that I will be submitting the article to, but just submitting to two was very useful. It took me about 30 minutes to write the article and about 5 minutes to submit it. All in all, a very good use of my time. If you aren't doing it yet, start writing those articles!