You hear Hodor! (Shout "Hodor" and lift your glass)
Jon Snow has full emo face
Red Viper (Prince Oberyn) seduces someone
Tyrion is drinking
Someone talks about the Night Watch
Something horrible happens to Tyrion
You hear "my lord" or "your grace"
As usual, choose your house and drink when you hear the name, see the insignia, or hear your house motto