I'm a huge hockey fan, and you can't possibly go to Canada without catching a game if you love the sport.
We walked to the Molsen Centre from our hotel on Crescent Street (yes, through the piles of snow) and found that it was easy to navigate to (of course, that's because it's so big that it was always in our line of sight!).
The Molsen Centre building was great. The game was a bit of a disappointment (at least for the Canadians!), but it was just great being in the crowd. The beer was pretty expensive, but what is a hockey game without a frosty beverage? It was a great way to spend a night, and we met a lot of really great people.