ComputerWorld’s Michael Gartenberg (who works for Jupiter Research) offers six valuable tips for success in business blogging:

1. Post early and often.
2. Link and converse. Part of the essence of a blog is the fact that it’s a conversation, not just a static diary.
3. Once it’s out there, it’s out there. When blogging, discretion truly is the better part of valor.
4. Better to be late and right than first and wrong.
5. Politics and religion don’t mix with corporate blogs.
6. Comments are optional.

I would add to point number 6 that although you don’t need to have "open" comments, you can have moderated comments (along with a visible comment policy) - this engages in discussion without the risk of unmoderated comments.

Image via morguefile