I write car reviews in a "blog" attached to the website. The reviews are relevant to my industry, and do seem to have a positive effect. For example, thanks to the blog, my website comes up in the top three on google if you search under the term "BMW 125" (and it does bring in business!). The blogs have also been picked up and copied, with permission 9and links back) on other websites.
I also have different categories for things within the blog such as general business news etc.
Is there anything relating to your business that you could write about? Could you become an "expert" about something and write about it on a blog entry?
If it helps you to develop any ideas look at the website at
www.solutions4finnce.com and click on the "News and Reviews" tab.
Best of luck
Justin