The licensing world does not wait for snow to get crackin on Christmas fare. I've been getting in the Christmas spirit, designing cards. These are some preliminary designs--don't be surprised when you see a post titled "Christmas in May" with slightly different offerings.
My process: I've been working with low-res iPhone snaps of seperate paintings and laying them out in Photoshop while I work towards making a cohesive line. (Apparently I like trying new, individual styles, so it's been tricky to keep them cohesive.) With a plan in my pocket, I'll scan them and make hi-res finals.
Don't get stuck on a particular look you're going for, play with the possibilities.