People come to your blog out of choice and not any compulsion. If you remember this, the rest is not important enough.
Content is the king - In the blogging world so diverse and big, you need to establish yourself with a distinction. the only road to it is good, original and valuable content. Be creative, different and surprise your readers once in a while.
Presentation is as important as good content. Have attractive pictures, fonts, etc. on your blog to hook the reader.