Nice idea! To speed it up they could use multiples of five or ten yards or start from the 30. I don't think anyone would give away the ball for less than 30 yards.

Too complicated. Just continue the game from the spot on the field where the "final" whistle blew, but start the clock anew with 15:00.

The best idea i've seen (and it isn't mine, but you can check it out on www.footballoutsiders.com) is a divider-chooser game.

In short, hte team that wins the toss chooses a yard line for the kick. The other team chooses to kick or receive. So, based on a coach's confidence in his defense, kicker and game conditions, he can decide what yard-line is best for him. It's pretty elegant.

Slate: Carter deduced that the value is negative when the ball is inside a team's own 20-yard line—that is, that the team playing defense will likely score before the one playing offense. Carter and his professor Robert E. Machol co-authored a paper based on his findings, "Operations Research on Football," for a statistical journal. Carter's insight proved prescient: In the 1998 edition of the book The Hidden Game of Football, the statistically savvy authors ran a similar study and came to the same conclusion. The expected value is essentially linear, starting at -2 points at your own goal line, moving to +2 at midfield, and rising to +6 at the opponents' end zone.