Write regularly, neither too often nor too rarely. Two to three blogs a week is a good frequency to maintain.
Originality - Focus more on the originality of content and on a consistent basis. It is a habit you will need to cultivate.
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.