Acknowledge and appreciate your readers, especially regular readers by replying to comments and visiting their blogs.
Follow up on comments you wrote on posts. Continue the conversation. Bloggers enjoy engaging with their readers.
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.