As many of you may have noticed, there is a Steam holiday sale going on and you will have been getting Holiday trading cards from participating in it. These EXPIRE on the 2nd of January, so make sure you either craft a badge or sell them. Even 8 cents each (they seem to be selling for 10 cents on the market right now) is better then letting them expire!

Or, if you have no interest in either of those, give them to someone who does! I personally will be more than happy to deal with your cards for you.