Oscar's early strike had given Jose Mourinho's side the lead in Sunday's clash at Carrow Road, only for Anthony Pilkington to equalise with a second-half header before substitutes Eden Hazard and Willian netted late goals to secure the victory.
The result was Mourinho's first away Premier League win since returning to the Blues this summer, something which Cech sees as a platform to build upon.
"It's always good to have a positive start and go one better so we hope to get better every game," he told Sky Sports.
"Today it was an important win for us especially in the circumstances that we conceded an equaliser quite late in the second half, so we can take another step forward.
"I thought that in the first half today, we controlled the game and we could have scored more goals than only one.
"Once they got back into the game, it's a Premier League side playing at home; they were full of confidence because it was only 1-0.
"They got the equaliser so it became more difficult for us but the reaction was great. From the moment the equaliser went in, we had to get up and went and scored the two goals."