Vidic only needs to remind teammates of last season's title collapse to keep their minds focused.
He told MUTV: "It is good to have this [seven point] advantage. But we have to be careful. There is still a long way to go. We have the experience of last year when we were eight points in front and in the end it didn't finish well.
"I think this season is different. We are more mature. We have young players who have the experience from last year. That is a big help for the team. With the experience we have already, we can do well I think."