Nigel Clough says the Blades must be positive from the first whistle against Coventry City on Saturday and offer no encouragement to the Sky Blues, who are currently one point and a place above the relegation zone in Sky Bet League One.
Looking ahead to the clash with Steven Pressley's side, Clough says City's predicament is comparable to where United were at this stage last season.
The Gaffer said: "Coventry will be coming desperate not to lose the game, they will fight and scrap for everything and we know that because 12 months ago we were in a very similar position.
"It isn't nice when you are at the wrong end of the table and struggling for a win, but if you can get a 0-0 away from home that gives you something to build on and from there you look to nick games by the odd goal.
"They will probably be a little nervous and apprehensive at present though, we were last season, so we have to try and capitalise on that and use it to our advantage throughout the game.
"But what we mustn't do is give away anything that will give them some belief or confidence, we have been very clinical of late and that must continue, especially on an afternoon when we might have to be patient."