Listen to your customers. Can the sales pitches and the product babble. Let your customer talk and show him that you are listening by making the appropriate responses, such as suggesting how to solve the problem.

Throw in something extra. Whether it's a coupon for a future discount, additional information on how to use the product, or a genuine smile, people love to get more than they thought they were getting. And don't think that a gesture has to be large to be effective.

Don't make promises unless you will keep them. Not planning to keep them. Will keep them. Reliability is one of the keys to any good relationship, and good customer service is no exception.

Train your staff (if you have any) to be always helpful, courteous, and knowledgeable. Most importantly, give every member of your staff enough information and power to make those small customer-pleasing decisions, so he never has to say, "I don't know, but so-and-so will be back at..."

Answer your phone. Get call forwarding. Or an answering service. Hire staff if you need to. But make sure that someone is picking up the phone when someone calls your business.

Be helpful - even if there's no immediate profit in it.

The irony of good customer service is that over time it will bring in more new customers than promotions and price slashing ever did!