Write something useful for yours reader. Share a relevant piece of information, an event update or a hack that makes a task simpler.
Avoid using SMS abbreviations in blog post and at least run the post through a spell-check in MS-Word before publishing. If the bloggers cannot take the time out to write proper English, why would the readers bother reading through that cryptic puzzle?
Respond with personalised comments rather than a generic Thank You. Fostering a conversation helps build the credibility of your blog!