Here is a great resource for small businesses (and others)! Business Advisor Online is packed with great information - like having a management consultant on your staff. They do a great job of collecting valuable articles by category, making it easy for you to find business information that you may need.
Here is their Strategic Thought Of The Week around Competitive Advantage.
"Competitive advantage, to be effective, doesn’t have to huge and pronounced; it can be incremental and subtle, as long as your business is consistently better in some way and customers perceive it that way. Every business would like to have a “better mousetrap,” but few actually do. Choosing a small, but effective, way to differentiate your business and sticking to it is sometimes all it takes to separate you from the pack."