If there's one thing you probably don't need right about now, it's more stuff. However, since every game on Steam is currently discounted somewhere between 10% and 50%, you might have to find a spare virtual nook or crannie to wedge in one or two bargains. The sale lasts until January 1st, so that'll give you time to pawn all the dodgy pressies you just got for Christmas and funnel the cash into Valve's enormous, billowing pockets.