Add or change images? Are the images in the post still relevant and appropriate? If this was published during the craze of publishing no post without some eye candy, consider changing the image to one more appropriate and related to the content, or remove the image. Think SEO. As you read through the article check for pronouns. Search engines exist for nouns, not pronouns. Name things. Name them properly. Use nouns everywhere and anywhere you can to add keywords to your content and help the visitor skim through the content faster to determine if this is the information they need.
Blogs are wonderful, but by their nature their archives are out of sight -- and out of mind, too.
Lorelle's created a great exercise to help you to polish up your blog. Why not add an image or two, and fix the SEO?