Danny Wilson is urging the Bramall Lane faithful to make the difference between now and the end of the season.
The United boss acknowledged his team is always followed in large numbers both at home and away and thinks the fans staying positive and backing the players will be what can drive the players on to securing promotion to the Championship.
Speaking ahead of Saturday's crucial clash with the MK Dons, Wilson issued a rallying cry to all Unitedites.
He said: "We have a tremendous level of support and if we are to be successful, we will achieve it together. A lot of people understand the togetherness that is required, what frustrated me in the Orient game was that we just needed a bit of help.
"There are going to be times when everything is going well and times when it isn't. Some teams might come and make it more difficult and on occasions teams might be better than us on the day. We need to find ways to overcome the challenges and if we are struggling on the pitch, the supporters in the stands can make a massive difference."
Wilson added: "We need that continued backing to push us on, especially if the players get nervous. When a player gets nervous he will make mistakes and the fans can help with that anxiety by remaining positive throughout a game.
"The way we play there will be mistakes and misplaced passes, but we will improve by believing in what we are trying to achieve. The coaching staff would never criticise a player for trying to be positive, even if it doesn't come off.
"We need to start positively and get the fans out of their seats, but when that isn't possible we need vocal support, as much as a possible to drive us one."