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.
Write something useful for your readers. Share a relevant piece of information, an event update or a hack that makes a task simpler
Blogging is all about sharing; no matters if the blog post is written by you or not. Keep spreading the good vibes for your readers.