The Shopping Cart
My father is a skilled CPA who is not great at self-promotion. So, when an advertising company offered to put my father's business placard in the shopping carts of a supermarket, my dad jumped at the chance.
A full year went by before he got a call that could be traced to those placards.
"Richard Larson, CPA"? the caller asked.
"That's right," my father answered. "May I help you"?
"Yes," the voice said. "One of your shopping carts is in my yard and I want you to come and get it."