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?
Tags: Use of relevant tags is important from the SEO perspective. It helps the search engine track your post based on the tags you use.
An interactive style of writing will help you gain readers, but steer clear of SMS lingo if you want to be taken seriously.