Brisbane won the Premiers' Plate with three rounds to spare by beating Melbourne Victory 1-0 at the weekend and said it is keen to take its momentum into the finals.
"It was a big relief to win something after last year's poor season but we cannot allow ourselves to take our feet off the pedal," Broich said.
"We need to keep the momentum going and build on our performances.
"I was very pleased with our performance at the weekend because we were good.
"But to win the championship we need better performances.
"We need to step up. We were not that ruthless in front of goal against Victory and it could have cost us.
"We need to keep the drive that gave us the premiership."
Broich said he just knew Brisbane was in for a strong season in the months leading up to the start of the competition.
"Pre-season was the moment that told me we would win the league," he said.
"You could see that there was a strong determination to do well after the previous season which was disappointing by our standards even though we made the semi-finals.
"We had a terrible feeling all year.
"Nobody wanted to feel that way again and we were smashing it in pre-season already.
"It was three seasons since we won the Premiers' Plate so we really had a point to prove.
"We just had that desire and winning edge which may have been lacking last season.
"People talk about our fitness levels that enables us to win matches late.
"Yes, we are very fit but it is also the desire that takes us over the line.
"We are never happy with draws, we want to win all the time."
Playmaker Broich has been in such sparkling form this season that many pundits have had no qualms about declaring him the finest and most influential import in the nine-year history of the A-League.
He is the brains behind most of Brisbane's attacks and in four memorable years in Australia he caught the eye with a series of magnificent goals and a stream of assists.
"I don't think you can compare players," Broich said.
"I am lucky to be playing for such a successful team so comparisons can be a bit unfair.
"Of course, it is an honour and flattering but you know yourself that you are only as good as your last game.
"Last year I had a poor season and nobody would have said that I was the best.
"It is really important for me to keep it going so hopefully people will continue to say good stuff about me."
Brisbane's next game is against Melbourne Heart at Suncorp Stadium on Friday.