Engage readers with well-researched and creative blog posts. At the end of it ask questions or feedback from them.
Respond with personalised comments rather than a generic Thank You. Fostering a conversation helps build the credibility of your blog!
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.