United have endured a stuttering start to the new campaign, losing their opening match at Everton before recording a narrow win over Fulham last Saturday.
They head to Southampton this weekend knowing victory would at least push them up among the early-season pace-setters prior to the first international break.
It would not be a bad way to recover from the memories of that desperate May day when a 20th championship seemed to be theirs, only for it to be snatched away at the death by Manchester City.
But Vidic feels it is time to forget about that anyway.
"You have to look forward. Never look back," said the Serbian defender.
"Whenever we won it before we never looked back. That's why we are successful.
"When you look back it doesn't make you any better. You always have to look ahead to the next challenge."
The challenge for Sir Alex Ferguson is to get a couple of orthodox central defenders on the pitch after being forced to name Michael Carrick alongside Vidic for those opening two games.
Ferguson was at Altrincham on Wednesday to watch Jonny Evans play his first 90 minutes since a summer ankle operation and it seems certain the Northern Irishman will be fit enough to slot in alongside his captain.
Thursday was full of draws and potential transfers though, with Bebe and Federico Macheda possibly joining Dimitar Berbatov in heading out of Old Trafford, which will play host to Newcastle in one of the most eye-catching Capital One Cup third round ties.
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It is the Champions League that is of most interest, though.
And although neighbours Manchester City have undoubtedly got the glamour draw, Ferguson will be wary of a pairing with Braga, Galatasaray and Romanian outfit Cluj given the disaster that unfolded last term, when United crashed out in the group stage.
"We have the experience of playing against Galatasaray in the past and we will always remember the 'Welcome to Hell' banners," Ferguson told www.manutd.com.
"We have drawn Portuguese clubs a number of times over the past few years and Braga are one of the improving teams in that country.
"Obviously, we've never played Cluj before but, after the experience of last year, we don't want to make any stupid errors this time.
"We will play our strongest team to make sure we get through."