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Speaking of Christmas - Steam has a big Christmas sale that's worth looking at. I won't go into details, but what you should really do is get some of those ultra-cheap indie games. You can get Braid for €2,24 (you might remember that from the list of top games of 2009!), AudioSurf for €2,50 (I just played the demo so far but I'm definitely getting it now.), and World of Goo for €4,99 which was worth the full €20 when I bought it. Even if you don't like indie games, if you get these 3 that's going to be ten euros (or dollars or pounds or whatever heathen currency you use) you won't regret spending.
Also, you'd be doing a good deed by giving money to indie developers. 'Tis the season after all. Also, way more fun than a pandaren monk!