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

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

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

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.

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.

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..."