Built some blogs and web sites that have link to your web sites, use blogger.com and googlepages.com are recommended
Exchange links with other sites within your niche, this also contribute to increase in traffic
Submit articles to article directories. Article directories usually have high pr and with your link in your source box under your submitted articles, our site will get backlinks for free. It is advisable if you create several version of your articles or else it might get banned by search engine for duplicate content. Other webmasters as well might use your article in their sites or blogs and thus increasing backlinks to your site
Use stumble upon exchange ( go to freebies section Digital Point forum)
There are many other ways to increase your pagerank. It is of course some of your hard work and time.