I have never played an RPG and I'm not sure if I'm supposed to do anything special or not when playing.

This post tells me what I should bring but what on earth do I do when I get there? I'm that before I start any game, or campaign I'll know what books I need that is not my question.

What is expected of a player besides the obvious be polite, respectful, and a good sport...etc. Is there anything that experience players hate seeing in new players at the table, if so what and how can I keep from aggravating the group/GM?