Use technology - Social plugins and SEO tools are a great thing to market your blog or a blog post. If you do not know about it, then learn it. It helps you reach out your audience in a better way and also improves the ranking of your blog.
Presentation is as important as good content, Have attractive pictures, fonts etc. on your blog to hook the reader.
Respond with personalised comments rather than a generic Thank You. Fostering a conversation helps build the credibility of your blog!