I thought of this recently when I was doing some shopping and after hearing but not feeling a few "thank's" at different stores, I was at a Nordstrom and the clerk really thanked me. I have to tell you it really felt good... And here I am telling you about Nordstrom- nice plug for them.
Give it a try, a heartfelt thank you to your clients...and by the way, Thank you for following my blog!!! It means a lot to me.