I send them out to all of the customers I have had throughout the year..I think its the right thing to do..and I always seem to some great refferals the following year..
I know my dad always did it when worked for him as a Ag mechanic back in Iowa but that might be just an Iowa thing. They seems to be overly friendly.
I think it is good because you get an opportunity to show your customers how much you appreciate them. But I guess you could just send your customers a post card right after you finish the job.
Jared
I used to send them out each year, along with a nice calendar. No more. The return on my investment was poor to zilch. Go ahead and see if they work for you. I even printed up 10% Off coupons to enclose. It was a waste of time, for the most part.
I send out cards to just about all of my clients and business contacts. The ones who don't pay don't get cards though. As far as ROI goes... slim to none, but the people I send cards to keep calling me back.