In this economy you need all of the positive business practices you can find.    One thing that has a positive impact on the bottom line is sending thank you cards.  And you will make a great impression on your clients and customers if you send each one of them a personalized birthday card.  It is also easier to get repeat business  from people you know and appreciate.  Sending cards makes them feel special and encourages them to be loyal to you and your business.  I have been doing this for a while and see people’s eyes light up as they thank me for remembering them.  Some say that it is the only birthday card they received.  That has a powerful impact!  It does not cost a lot.  (I pay 62 cents per card.)  And it sure makes the world a better place to live with an easy act of kindness.