My site has good content and having more unique articles. How does go for backlinks. I mean with free service.
You have to do the off page optimization for your website. Basically you have to do one way (directory submission, article submission, press release, social bookmarking and networking as well), two way (reciprocal), and three way linking.
Submit your site to social bookmarking site may give you more backlink. Also viral promotion and social interaction is necessary. PM: If your blog use wordpress I can give more detailed tips.
I do more offpage work in your site like soical bookmarking, directory submissions, blogs comment and one most important thing link exchage. hope they help you.