Many men will look at this title and say "this is a post for women" but I know that there are some very good customer service activities ANYONE can do in their business.
Know and Use Their Name
I take a taxi to the hairdresser from the same company each time. I chose this company because it didn't charge a fee for using their wireless device when I use my credit card. Now I have found more reasons to keep using them.
The dispatcher knows my name and address when I call from home (I know that this is available to everyone now - a technology feature). She says "Hi Trudy" which is a bit more friendly. But when someone at the hairdresser calls in for me when I've finished and the dispatcher asks "is that for Trudy?" the caller and I both smile broadly. That's why I stay with them.
Ask if They'd Like A Coffee or Tea ... and then get it.
Would I like a drink of something? Someone asks. This is another way they show me friendliness. They remember what I had last time, too . They bring me back a little something extra. In the case of my hairdresser it was a cookie.
Listen
I know this is one of the reasons I (and many other women) go back to the same hairdresser for years. She listens - with interest. And not only does she listen to me but I do to her. We become "part of the family". My hairdresser truly cares about what I do.
Not only does my hairdresser do these things - listen, care, remember, ask - but every one of her staff does, too. Could you add this kind of customer service to your business? It makes me a loyal
client who goes back over and over.

Me at the hairdresser's in Sept 2008.
I was trying to look "professional".