The rules of the web are changing.   Key words and meta tags are no longer enough to drive traffic to the website for your small business. .  The search engines are getting smarter and they are looking for real, relevant and timely content. 

 Constant updates to your website can be difficult, expensive, and impractical, but incorporating a blog as part of your site will accomplish the same thing. 

I found this article on a Brittish website with ten basic rules if you are going to build your own blogging stratgey.   http://www.the-escape.co.uk/reference/blogging-tips/