A stunning 38-35 double overtime loss to the Baltimore Ravens in the divisional playoffs still sticks with the team, and Manning called the setback "a motivating factor" as voluntary workouts kicked off Monday.
"I know that (executive vice president of football operations) John Elway wants to sort of set kind of an attitude and an edge around here -- maybe a little bit of an uncomfortable atmosphere -- which I believe in," Manning said.
"Last year was good, but it wasn't great, and we're looking for that great season and to finish off with a championship season. We have so much work that we have to do."
Manning didn't elaborate on how the Broncos plan to make a more uncomfortable scene, but it's clear the team will be hyper-vigilant about letting complacency seep into the building.
Manning turned 37 last month. He's running out of time to capture a second Super Bowl ring, a reality both he and Elway are well aware of.
Follow Dan Hanzus on Twitter @DanHanzus.