This is an excellent time to do a mid-year review. One way to do this is by surveying your clients, vendors, employees and anyone that is important to your overall business. You can use a free and simple tool such as Survey Monkey http://www.surveymonkey.com/.
Performing a survey gives you a better understanding of how highly (or not) your customers are likely to do business with you again and refer you on a consistent basis.
Following up on all your feedback gives you a reason to touch base personally with the people that matter most, especially your clients.