DON'T drink your heroin beer through a straw, it makes you look like a loser. It is mostly younger females who tend to do this, it's like they have to look cool by drinking beer at the hockey game but don't know how to do it right.
DON'T provide a 24/7 colour commentary (ie. "shoot! why didn't you pass that? c'mon, skate guys! wow that was horrible. conroy you idiot"). It's fine to express the odd displeasure and what not, but there's people who won't shut up the entire game, it's a running commentary and it gets annoying. We're all watching the game, this isn't the radio, we don't need your description of everything.
DO get the buffet at the Avison Young Club before the game. Great food even though it's overpriced.