Recently I made a purchase from an artist and included with the purchase was a postcard about the business, a business card.  But to my surprise written on the newsprint wrapping was the thank you note.  What a unique an inexpensive way to thank a customer/client.    I always enclose a thank you card for the purchase but I may be thinking of other ways to do do this in the future.  If you have any ways that you are thanking your clients or would like to see more ideas along these line ucse the contact page.