Here are the few things I've picked up over the past few seasons to help me through the game:
1. The computer imposed First Down line is Extremely helpful when watching a game on TV. Basically, the offensive football team has 4 tries to make a First Down. Once they make a First Down, they get to start the four tries over. If they don't make the First Down within four tries then the other team gets the football.
4. Main Scoring Opportunities:
Touchdown = 6 points
Field Goal = 3 points
P.A.T. (Point After Touchdown) = 1 point
Going for Two (where the offensive team runs it in after a touchdown) = 2 points