Some questions:
1. What time should I arrive?
Between 60-90 minutes before the game is ample time...
2. Should I grab a pro and just tag along?
It's never a bad idea to follow the lead of someone who has done it before, but make sure you let them do their job.
3. Introduce myself to everyone in the press box?
Uh... No...
4. Food? I think I'll just go with the flow...
Follow the lead of the other writers there.
5. Keep my mouth shut during post-game, right? Unless I can think of a good question, I won't say anything. I might interview someone who is free, though. Get my nose dirty.
Not necessarily, but if you're not working on deadline, be mindful about those who are.
6. Although it's not a beat, should I be kind and offer my seat to writers on deadline (I'm monthly, but my deadline is still the next day)?
Not necessarily.
7. What do I do between periods?
Masterbate.
8. If people start leaving early (say, one minute left), should I follow them to the rooms?
If you're not on deadline, I wouldn't...
9. Let the TV folk go first, right?
Never....
10. Anything else...