How to prepare yourself for future hockey games

Attending one professional Finnish hockey game does not make me an expert, and I admit that any conclusions I draw on that one game may be based on anomalies that may never happen again. But I have nothing else to go on. So to make sure that I survive that next hockey game in good order, here are the rules that I have so far.

1. If you have a ticket for the 3rd level and you ask a concession stand worker on the 1st floor where your seat is, you will be pitied because obviously you do not understand this complicated 1-2-3 level construction of the arena. Avoid such pity by wandering around until you stumble upon your level and seat.
2. Even if the 15,000-seat arena is filled by only 6,000 fans (only a handful who have found their way to the 3rd level), your seat assignment is not "suggested seating" as in the US; your seat assignment is where you sit the entire game. Perhaps even longer. Sets of strangers thrown together by fate will practically sit in each other's laps rather than spread to any open seating.
3. You do not look at or address your new companions because, well, that is just not done. However, you know by your Finnish experiences that they would take off their shoes and give them to you if you were in need. But an event needs to precipitate such gestures.
4. Keep your shoes on at a hockey game. And do not put your feet on back of an empty seat in front of you until well into the 3rd period when such behavior is tolerated.
5. Do not load up with concessions before taking your seat. Concession food is the same as in the US, but most seems to be consumed in the concourse areas. Wait until the 3rd period. The magical last period. Concessions seem to be allowable in the seating area in the 3rd period, and that is the moment to consume a soft drink, if absolutely necessary. During the 3rd period you can also put your feet on the seat in front of you.
6. If you choose to eat popcorn, do not let any drop. In the US, popcorn seems to be everywhere -- on the floor, under the seats, on the seats, in your clothes. It is like edible confetti. But in Helsinki popcorn is eaten as carefully as caviar. Perhaps because each small box of popcorn costs many euros. It is precious. And remember rule #5.
7. Get used to the fact that everyone knows much better than you the lyrics to the English-language rock song snippets played at every available moment when the puck is not being slapped around on the ice. Do not try to sing along.
8. Because legroom in stadium seating is an unfamiliar concept on any continent, leaving your seat while your row mates are still sitting is difficult. Solution: Do not leave your seat until intermission between periods, unlike the US where spectators seem to be encouraged to wander instead of sitting and must have more desperate bathroom needs than Finns. Perhaps because we don't adhere to rule #5.
9. When someone on your team knocks a fellow on the other team off his feet, you need to cheer. When the reverse happens, you need to complain. Hey, sounds familiar! Just like home. Enjoy this international custom.
10. You may not know what the announcer is saying, but if your image is shown on the large scoreboard during a break in the hockey action, it is required that someone next to you tap you on the shoulder and direct your gaze to the scoreboard. And "Kiss Cam" needs no translation. Be ready for it.