Christmas isn't over. It just started! You may have to drag that needle-shedding tree out to the curb, but please consider keeping your outside holiday lights burning and candles burning in your windows for at least the Octave of Christmas, which ends January 1, 2006.
Even better, keep that Christmas light burning through Epiphany, the Feast of the Three Kings, on January 6th. The link has some good ideas for keeping the holiday going for the little ones (and the big ones, too).
If we want to insist on keeping Christmas alive in our secular culture, we'd be good witnesses by keeping to the timing of the liturgical calendar. Making the "Twelve Days of Christmas" an actual event in our homes is a good start.