Do you really need to send all those holiday cards? Be honest. Many folks on your list are too busy to read your card and won’t remember a week later if you sent one or not. Clean out your holiday database by at least 25%. Here's a tip to make it simple: if when looking at your list of names, you have no idea who the person actually is, chances are you don't need to send them a card.
Struggling with the fact you haven't sent a card to Aunt Rhoda? Here's a nifty fact: Aunt Rhoda will (we all hope!) still be here after the holidays. A card from you - with or without Santa but definitely featuring a hand-written note about how you're thinking of her! - will still be welcome in January, February, or at any time of year. There's no time that people *dislike* being cherished and thought about!