In my opinion, blogging is one one of the core marketing activities that EVERY business should do. That being said, it's one of the cheapest and most fun. Check out this article that I wrote, "How to Make Money from Your Blog in 7 Easy Steps".
The most important thing that I have learned about blogging is that you need to find a way to educate your audience. We live in a world that values searching for things we want to know about. Also, keep articles brief and simple (use bullet points & headings). Your audience will increase in a relatively short amount of time.
Last month, my blog, www.MikeVeny.Com doubled in traffic. If you have any other questions, please feel free to email me.
Happy Blogging!