The following is from an article written by David Frey, President of Best Practices Inc., a small business marketing consulting firm and editor of the Marketing Best Practices Newsletter.
"Use Membership Cards
Open your wallet right now and you’ll probably see several membership cards. That’s how I came up with the membership prices for Sam’s Club, Hollywood Video, and the local library. I also have a membership card from my local grocer, health club, and airlines (Continental and Southwest).
Membership cards serve several purposes beyond just holding my personal and transaction information. It serves as a gentle reminder for your customer to take advantage of their membership. You can also use it as physical evidence for proof of membership. In addition, you can use it to mark off visits or purchases of specific product much like a subway sandwich card"