Keeping your reputation squeaky clean's about more than just good PR.
Now for SEO! Maintain (or regain) control of how your brand appears in SERPs. Part of that includes running a well written, error free blog. (This Style Guide Template should help.)
Need a catchall? How about this: don't break the law! These are the big ones marketers should know.
Done, with 5 words to spare! How do you help maintain your brand's online reputation?
Image credit: davidden