Remember that content is the key to a successful blog, Quality scores over quantity in getting audience to your blog.
Engage readers with well-researched and creative blog posts. At the end of it ask questions or feedback from them.
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.