5 ways to promote your company with a blog:

1. Enhance the conversation.
2. Link to and comment on others.
3. Include topic-related keywords in titles.
4. Unearth interesting things to share.
5. Let your personality out.

Link via Building a Better Blog; Original by Gary Stein.

Other ways to use with caution:

6. Showcase promotions
7. Link back to yourself
8. Showcase your achievements
9. Showcase customer service by being open on issues