Your business blog is an important component of your local SEO. To ensure your blog remains a critical part of finding new customers and generating local interest, you want to make sure you're using the best practices available.
One of the most important aspects to remember is that keywords can be fluid - what worked in getting your company high search rankings last year may not work as well today. If you can't remember the last time you performed keyword research, it may be a good idea to test your terms again and ensure they're still working well for your site. You may find that you need to add some new terms or phase out older phrases that are no longer resulting in many hits.
If you're noticing a decrease in rankings or page hits, it may also be time to revise how you're using your keywords. Using too few terms means your page may not rank, but on the other hand, using too many can make your page seem spammy and over-optimized. Develop a strategy that uses well-placed keywords frequently, and have someone read over your posts before they go live. This will give you a second opinion on whether the piece has too many - or too few - terms and can help you regain your rankings.