I came across a great post about blogging by Rachelle Gardner: http://cba-ramblings.blogspot.com/
Several of her tips caused me to pause and consider my own blog:
1. Ranting - I do it sometimes... No apologies. You can skip those posts if you want to, but my ranting tends to be more about daily life issues, not the publishing industry.
2. Irregular and Infrequent posts - I'm getting much better at this since I figured out the "post options" and now know how to schedule future posts. I know some blogs have a "theme" for every day they post. I can't do that. I'm too ADDOS for that. (What is ADDOS you ask? Attention Deficit Dis- *head jerks up to the flying object in the sky* OH SHINY!)
3. An unfocused blog that doesn't know what it's about - OH I KNOW. Look at my header! It's about reading, writing, and eating... not necessarily in that order!
Do you follow a check list for your blog? What do you think makes a great blog?