In addition to my grocery store experience, I often think about companies that bend over backwards (like cell phone companies, cable, etc.) to get new customers, but who do not offer special deals to existing customers – and who often lack in customer service. I think throwing a worthwhile deal and some great customer service to existing customers would save these companies so much money and time.

Thanks again for the comment.

Your tips provide some good advice on how to keep your current customers with you above all else.