My card is one that I custom made, online with Vistaprint. It's just a photo of me playing the keyboard and in extra large print the words "Thank You" across the bottom of the card. On the back of the card, it has my name, address, telephone number and Email address. It's just a post card, and all I have to do is slap on an address label and a stamp. Quick, easy and efficient. The Christmas cards are a great deal, and they're less expensive now than they were a couple years ago.
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!