The AFC East side comfortably beat the Cleveland Browns in the opening week of the season, before securing narrow victories over the Indianapolis Colts and the Atlanta Falcons.
The quarterback told reporters: "I think it's an all-round effort. I think guys are comfortable in the system now, being our second year here. Everyone understands that it's crunch time and it's kind of do or die.
"Either we make a play and hang in this game to win, or we let it slip us by. I think last year we let situations slip by us a lot more than we should have.
"We rep it a lot, we get a lot of practice of it in the off-season in camp, we've done a good job at this point."
The Dolphins will look to extend their unbeaten run when they face the New Orleans Saints on Monday.