How I Wished My Best Customers on Their Birthdays
marketlocomotion.com
marketlocomotion.com
Both times, the card included a $5 gift card to Starbucks and a "thank you" for being a Discover customer. Both times, I opened the card expecting to find a message from a friend or relative based on the appearance of the envelope.
That's much different and more personal than an automated birthday message or an automatic discount on an item during the month of your birthday. It might sound cheesy, but these kinds of things really do stay in your memory and help to create a human connection, even with big companies.
-Ask them when they are inputting in any kind of sign up form for your product (if you have one). Probably best to make it an optional field though
-Mine the data using facebook (if your clients are on your facebook list)
-Send out a survey with some incentive, and with some q's that would gain some knowledge about them plus their date of birth