El_Caz: NOTHING! I bought NOTHING! I HAVE THE (will)POWEEEEEERRR!!!
Seriously, I thought I'd cave at some point and fetch myself something from Steam or GOG, but I already have enough games to keep me busy for quite a while and buying because they're cheap instead of because I want to play them was starting to hurt my wallet. Once I play and install some games off my backlog, I'll feel less guilty but seriously, I can easily manage until the next christmas sale with what I have on my shelf right now.
This, exactly this in my case. This year I bought a handful of Steam games and with my backlog both on Steam and on GoG, I might be able to wait until next Christmas! ^_^
This is of course without counting ME3 and the possible release of Guild Wars 2, which i will buy of day 1, because I can't possibly pass on these games.