Students in almost all of my classes this semester are blogging, with varying degrees of success so far. I recorded a six-minute Prezi with tips for them to improve their blogs.
UPDATE 2-15-2010: This Prezi was recorded with my PR Writing and Social Media for PR classes. If you’re in PR Practicum — a one-credit class — your blog has slightly different guidelines; you “only” have several specified topics to write about and blog comments to write. Most of the rest of the information I shared in my Prezi does apply to you, though.