"I think we're a football team that has small margin for error," Romo said. "I think we understand that we have to play a very sound football game with little or no turnovers each football game we play in. We've done a good job of that all season and we didn't do that as well last week, so we got to go back to that."
Romo was intercepted twice late in the fourth quarter of last weekend's 37-36 loss to the Packers, setting up Green Bay's winning score and ending the Cowboys' chances at a comeback. The Cowboys are 1-2 when they score at least at least 35 points in a game this season. The rest of the NFL is 51-2 when it scores at least 35 points.
The Dallas defense has given up a franchise record for yards in a season (5,982) and is on pace to give up the most points in a season in team history. Despite the woes, Romo carries belief into Sunday's game against the 3-11 Washington Redskins.
"Everything that you've done this whole offseason and throughout the season is to build to this point," Romo said. "I think we have an opportunity to do something these next two weeks that get us in the playoffs and win the NFC East.
And not a lot of teams can say that in our division right now. Two of them are done, two of them have a chance."
With a win Sunday, the Cowboys would be in their third straight winner-take-all Week 17 matchup for the NFC East. If they lose to the Redskins, they would need the Philadelphia Eagles to lose to the Chicago Bears on Sunday night to set up a division championship meeting.
The Cowboys lost in 2011 and '12 to the New York Giants and Redskins, respectively, on the road. The Dec. 29 meeting against the Eagles is at AT&T Stadium.
"We feel fortunate to be in a position to control our destiny," Romo said. "Last year we obviously didn't [get it done]. We had to sit with the Washington feeling all offseason. This year it's a great feeling to know we can go out and be a better team than we were last week and be able to do what we want to do ... Would you rather have that [Green Bay loss] be the last game of the year or would you rather have two games left to go win the NFC East? If you don't feel good about what you can still do, then you just haven't played the game long enough. It's a positive to have games left still and have an opportunity to do what we want to do."