"Before you get a GM job and you're reading about certain things, like little rule changes here and there, (you think) 'Yeah, you know, just change the rule, no big deal,'" Guerin said. "No, it is a big deal, and the smallest little rule change can just have a huge impact on the game of hockey because we're in the NHL, we're the best league in the world, and if we make a rule change it's going to impact every league below us. And to me, that was a real eye-opener. The smallest little things mean a lot."