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.
Series of articles - Create a series of articles on your blog if the subject you choose to talk about is an extensive one.
Audio Copy - Making an audio copy of a blog post is a great way to market your content. You can use it to share on a podcast feed. It is easy, fun and mobile.