For those not in the know re: the new overtime rules, that�s what we�re here for.
First, let�s brush up on the old format that will still be used during the regular season: It�s simple. A coin toss decides who gets the ball, and the first team to score wins. That format leaves the fate of the game in the hands of a coin, since every team who wins the toss will elect to receive, they only have to potentially go 35 yards to set up a game-winning field goal. (Okay, well, almost every team will elect to receive: I�m looking at you Marty Mornhinweg.)
The new rules, which will be adopted for the playoffs only, are a hybrid of the current format and the college setup. Basically, if the team who starts with the ball goes down and scores a touchdown the game is over, but if they only get a field goal the other team has one chance to answer back.
If the team with the ball first has to punt, or there is a turnover, it goes straight to sudden-death. The nice tweak they added gives teams more incentive to score a touchdown, and makes the chance higher that both teams will have the ball.
http://www.sportsgrid.com/nfl/2011-nfl- ... explained/