Everyone loves it when you double check something for them. Pretend it's you. If you're working with a customer, either on the phone or in person, and they need something, pretend it's you. Let your customer know you're on their team. When customers feel as though you're part of the package, they love it.
Eye contact is critical in delivering excellent customer service.
Heads that turn on a spindle and look everywhere but at the customer, get very few good marks in customer service. Do something extra. For example, keeping a stock of penny lollipops for kids when they come into your office with the moms. Or a balloon. The thought of getting something free is very special to the customer.