Expanding on the "your business needs a website" point, we get into why it's important for a business to have a blog and the benefits a regularly-updated blog can have for your business. Note: This article no longer exists on my personal site.
There are still businesses -- small ones, mainly -- that haven't managed to get on board with the 21st century and don't have their own websites. Why? Many reasons, apparently, but they don't outweigh pros of having a site for your business. Note: This article no longer exists on my personal site.