You can go to Dishpointer.com (http://www.dishpointer.com/
) put in Gillette Stadium in the Your Location Box. Pick Anik F2 in the drop down box.
It will output something like this:
Azimuth (true): 231.2°
Azimuth (magn.): 246.1°
LNB Skew [?]: 35.3°
Like dirtroad said you can pre-set the Elevation and Skew. I'd take a magnetic level like in the photo below and ensure you are plumb in both planes when setting up the Tripod / Dish.
Then I'd use a compass and go to 246°
And if the Sat Gods are with you, and you haven't had too many Pops, you should be close.
But I'd just go and watch the Game and the Antics at the Tailgating Parties...