Bring that customer back

How many times do you hear “I’ll be back”. This is a “be back” tip: take one of your business cards and write “10% Discount” on the back and write the first name of the customer that almost bought something then said they would be back.   Or write a 10% discount code on the back of your business card and tell the customer it’s a one-time offer to cover postage when they order from your website.