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?
Broken links irritate visitors and can badly affect your ranking. Check and repair all such links on your blog.
Optimize images by mentioning the ALT Text and a short description of the image in your blog post to rank better in Google.