Start a buy 10, get 1 free punch card for your cigar customers. Customers love them! They love feeling like they get something for free and you get a loyal, repeat customer out of it all! Feel free to set the rules to your advantage. Also, there's no need to necessarily use paper cards when you can use a simple contact software like Outlook or something similar. Our rules are that if you buy 10 cigars over $10 each they get any cigar under $7 for free. We've been doing this for years with great results.