A 1-0 win over Reading on Saturday evening thanks to Wayne Rooney's deflected first-half goal moved the Old Trafford club to within 13 points of winning the Premier League.
The title is therefore within touching distance but, having seen his side blow an eight-point lead in the last six games of last season, Ferguson is demanding full focus.
"You don't get points and medals for being complacent and we won't be," he told MUTV. "I think the players are conscious of the importance of the games now and that concentration, which has improved, has helped us do that [in terms of keeping clean sheets].
"I think, before the game, we always thought that winning was the important thing today.
"It wasn't a great performance but where we are today is not down to today but the last six months.
"The team has shown great consistency and played a lot of great football. Our goal difference is big over City now - 13 goals. It's a great position to be in but the only thing we can do is win our next game."
The Premier League now goes on hold for the international break and Ferguson has confirmed Rio Ferdinand will meet up with England after his surprise recall.
Ashley Young is expected to be fit to also join the Three Lions squad on Monday night despite being substituted with an apparent knee problem against Reading.
Ferguson has already bemoaned his United squad suffering from fatigue and the international break is consequently far from ideal for the Scot considering they travel to Sunderland on 30th March for a lunchtime kick-off, and Chelsea 48 hours later for their FA Cup quarter-final replay.
"With the problem I've got, a lot of players are away on international duty and play two games," said Ferguson, who made eight changes to his first team to face Reading.
"They come back and we've got a lunchtime game against Sunderland on Saturday and then it's lunchtime again against Chelsea on Monday.
"Why have we got a squad if we don't use it and we did today."
Ferguson added: "We are making arrangements for some players to fly home by privately hired jet after their matches to make sure they get home as quickly and as smoothly as possible.
"Tiredness is a great leveller but we'll do our utmost to make sure we field the freshest possible teams.
"Private planes are going to cost the club an awful lot of money but it is something we feel we have to do."