I love decorating the house and cooking for everyone. I exchange goodies with some of the neighbors, and enjoy thinking up gourmet desserts to give them--this year, I'm giving out banana jam, green tomato relish, and cranberry sauce that I canned, instead of baking.
I also love having my in-laws come down for an early Christmas--I move the dining room table into the study (that's where the fireplace is, and it's a much larger room). I have have a nice fire going while we eat dinner, and decorate the table. I have a small, faux tree in an urn, too. I put a small, wrapped gift at each place setting, and we play "Dirty Bingo" (or "Yankee Swap"), which is their tradition. We always have so much fun! They're great folks, and I love being with them.
I also have a tradition of doing something for charity every year--no matter how small a gesture. To me, that's very important. I think doing something selfless helps keep the holiday in perspective.
I usually have at least 1 week of vacation then, too, and enjoy spoiling myself! I usually meet friends for lunch, do a lot of reading by the fireside, pet the cats, and hit the post-holiday sales, take myself out to lunch, etc. (DH has to work, so I'm alone.) This year, I'm hoping to spend some time at a day-spa, getting a massage, pedicure, manicure facial, etc. (If I can afford it!)