Christmas is coming, and you're about to have a ton of time off. Some of that time will be spent energetically tearing apart beautifully-wrapped gifts, and eating food is certainly next on the list of priorities. Obviously you have to play with your new gifts (or put on your new socks), but after that... after the postprandial sofa-surfing grunts and burps and farts... well, there isn't a whole lot you can do.
The other big thing about Christmas is the amount of waste it produces. Wrapping paper, cards, ribbons, the plastic packaging of the presents themselves... there's an awful lot of trash on Christmas Day. Then, of course, you need to throw out all of the things that have been replaced by new gifts: old kitchen appliances, clothes, televisions, printers and, most importantly, computers. A new laptop or desktop is incredibly cheap nowadays, which makes them very popular gifts.
But shouldn't we do something with the old stuff, rather than just throwing it out? Of course, you could Freecycle or wade into the Craigslist cesspit, or give your clothes to charity -- but hold onto those old computers! You'd be surprised with how many cool things you can do with an old desktop or laptop computer. You could finally learn how to use Linux, or set up a media center PC so that you can watch downloaded movies on your TV. You could create a locked-down box for your kids to surf the Web on, or a network-attached storage server for your backups. There's almost no end to the list of neat things you can do with an old PC!