Donny, I use post cards, too. I have one that is a thank you card, which always go over well, and a couple others as introductions to AD's in new places. All those mailings are very effective, particularly when combined with followup telephone calls and visits with other goodies such as pens and appointment calendars.
I figure my total advertising outlay each year is under $300, which is rapidly recouped with the first couple NH jobs. I could have easily booked 500 jobs this year, but I'm just too damned old for that kind of schedule anymore. I had one facility that is about an hour's drive away that wanted me to work at least 3 days a week, and possibly 4. Just too long of a drive in nightmare traffic during rush hour.
Gary

_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)