Vallewag, a Silicon Valley news blog, has a concise summary of the best practices for writing a company blog.

How to write for your company's blog

Some highlights:

• It's not about you, it's about your products. Talk about your products.
• Be useful -- focus on facts, not opinions.
• Keep it short. 1-3 paragraphs (100-300 words). Two short posts are better than one long one.
• Write daily. Publish it before noon.

For more info on hitting your blogging goals, check out our Blogging category.