This article is targeting corporate blogs but some of it applies to all bloggers.
Just Do It.
How do you learn to blog? By blogging. Badly at first, but improving with each push of the publish button.
Link, link, link.
The most important thing to do in a blog post is provide good links.
Listen. Learn. Rinse. Repeat.
It’s a conversation, right? How can you learn anything if you’re always running your mouth? Pay attention to comments. Respond to them. Use Technorati and other blog search services to track what people are saying about your company, your service, your area of expertise. Respond on their blogs. Great blogging is really about reading, understanding and synthesizing. The writing is mostly flourish.
Ping, Don’t Pitch.