Photo credit: smcgee via flickrI stopped in at a local OD's office today. Last month she ran a "cash for clunkers" promotion. She offered $100.00 off a new pair of glasses for patients that brought in an old pair to be donated to the Lion's Club. Today she reported her promotion resulted in a 41% increase in revenue for the month. All she did to promote it was send this email to her patient list. Not bad for this time of year given the current state of the economy.