Add your personality - If you are writing on a particular topic, there are a number of people who will be writing on the same topic. So you need to add that specialty to your blog to make it look different and to allow your readers to take away something that the others are not offering.
Broken links irritate visitors and can badly affect your ranking. Check and repair all such links on your blog.
Research: Use blogs that publishes content that is based on research ans is relevant to what your topic is.