Meylah, a crafty person's business blog, offers some holiday marketing ideas. They are designed for crafters but really I think most businesses could take this advice, tweak it and run with it.
My favorite idea is "Send clients an early holiday card or newsletter" - so easy! Also, I like the idea of taking your products and making them look like they fit in with the holiday theme.
Another great idea, throw a party! Invite people over and sell your stuff. Not only good for business, it's just fun.
Check out the rest here.