-In addition to wrapping up paintings on the walls, you can "wrap" your front door and make a huge bow on that.
-You can fill any clear vases you have on display with candy canes or those small, pillow shaped red, green and white peppermints.
-Fill any glasses (like wine goblets) you may have on display with red and green confetti.
-Put a Santa hat and some big men's boots (you can get them for about $2.50 at Goodwill) by the door, or wherever you & your family or guests put their shoes when they come in. (It looks like Santa is over, haha!)
-Let the kids make snowflakes and decorate doorframes with them.
-Dig up every Christmas movie/dvd you might own and display them on your enterainment center.
-Most cities have a local radio station that plays only Christmas music around this time - play it often to put yourself in a good mood.