My favorite B-to-B promotion:
CPR Instructions Foldover Wallet size card
I forget my CPR certification after 90 days. Nursing home and hospital administrators probably do, too. I designed this foldover card to be the same size as a business card, so potential customers could take it out of their wallets and review it while they waited for appointments.
Sometimes effective promotions cost nothing
As a Realtor, I listed a house that fronted a river.

Serious buyers would want to know that the house was not prone to flooding. An insurance agent ran a Comprehensive Loss Underwriting Exchange(CLUE) report, showing that there had never been a flood claim against
larger the house.
A Microsoft Office Live Small Business Partner