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.
Build a community - Connect with like minded people/readers to know what they expect out of you. Interact with them at regular intervals and take their feedback. It will help you gauge a trend and hint you towards a direction you want to take your blog to.
Spare time to read - Blogging is not just about writing but also about research and reading. Read as much as you can to learn new things and ideas that you can experiment with on your own blog.