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..."

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.

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

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.

Deal with complaints. If you give the complaint your attention, you may be able to please this one person this one time - and position your business to reap the benefits of good customer service.

Lower prices are not service; they're just lower prices.

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..."