Keep your posts simple! Do not try to impress anyone. be yourself! Visit other blogs which might interest you, take part in conversations or simply put your two cents for others to read and follow you back to your blog.
Blog for the fun of it and show character. It is immaterial how many write about a particular subject, it is how you write the matters.
Remember that content is the key to a successful blog, Quality scores over quantity in getting audience to your blog.