There's no need to wait until January. If you're not already up to your Christmas crackers in bread sauce then it isn't too late to give yourself a little Christmas present today and this is what the gift tag says:
Don't bother to keep the receipt. No refunds or exchanges necessary. Give yourself this gift and you'll be much nicer to everyone today (you'll also really enjoy your dinner and the first tipple will go straight to your knees). What could be more festive than that?
*substitute other activities (e.g. bike ride/Twister/wheelbarrow racing) as you see fit.