Instead of not drinking, just hit the bathroom BEFORE you go up to your seats. Fewer lines before the game. The announcer yells, "And that play is good for another Patriots'..." and everyone yells, "FIRST DOWN!" and makes the signal toward the appropriate end zone. Make sure you high five everyone around you upon a score and they play "This Is Our House" by Bon Jovi after a TD, so sing loud!
Have a great time. I am not going as I gave my tickets away at the beginning of the year before it became apparent how important this game is.