Pfft, forget forward planning what to wear on Christmas Day. All you really need is an elasticated waistband, and you're good to go.
Instead, think about New Years Eve. Whether you're hitting the town or sprawling like a cool kid in front of Jools Holland's Hootenamy with a load of drunken oldies (this idea is becoming more and more appealing..), face up to it, the last day of the year is always something of an anti climax. So you may as well ensure that you'll feel good about what you're wearing.
Sure, you could wear plaid this New Years, like everyone else (and his great uncle's wife's next door neighbour), but why not branch out a little and release your inner Hiawatha. Grab the face paint, blusher, hell, even the tomato sauce, let go and paint yourself happy.
[this image has gone on holliday and will be back shortly..]