Thank you note and customer service.

A thank you card is an old tradition, however in today's world receiving a thank you card is one of the highest acknowledgements one can receive. It is a sign of appreciation, a sign of sincere thanks--you have to write it, put a stamp on it and mail it off. Unlike email, quick and no effort. Sending a thank you card is so personal that it touches others upon receiving it and opening it.
People love to get mail from the mail box--not opening up in email, but a good old letter or card can go a long way.
Send a thank you card, let the business know you admire there hard work.
A personal touch that will separate the good from the GREAT.

When I completed a bicycle trip from Indiana to Orlando--I sent out over 100 thank you cards.....It is an effort that stands the test of time.....NO EMAILS!