Keeping Customers With Good Customer Service

Successful companies provide proactive customer service.
Proactive customers service leads to increased business and loyalty.

Here are a few tips to keep in mind:
Be a double checker
Customers appreciate it when a sales representative takes a minute to check on an item they've asked for. It lets them know they're being listened to and cared for.
Do something extra
Average service is about meeting the customer’s expectations. Great customer service is exceeding it. Give your customers more than they expect, and they'll return to do business with you.
Take the initiative
Offer several solutions to the customer's predicament. If one doesn't work, make sure you have multiple avenues to resolve their problems. This way, the customer knows you are trying your best to help them, and in the future will not hesitate to buy from you, since they'll know whatever problem they have, you'll be able to fix it.
(Taken from Bottom Line Business.)