I have to say, it has to work with Social Media Marketing. And, now it is not only content, submit to blog directory, it is about online reputation management. Since Google now able to crawl social media e.g Facebook and Linkedin, putting in right keyword in your Facebook page or group, having discussion, engage your potential on Facebook is a must to draw traffic to your blog.

Many people actually spend more time on social networking site compared to Google.

Just focus only on your blog is not enough. Build a virtual online community thru genuine relationship. It may need long time and a lot of hard work, but it last longer.