Over the years of working with small business owners, I have seen some of them get too comfortable with their success and let their business run on auto-pilot. They let their staff continue their normal day to day business and assume nothing is going to change.
Make sure you keep involved on what is going on in your industry. Make sure you are staying on top of new technology, trends and competition. This is a sure way of making sure that you remain a market leader in your field.