Danny Wilson believes United's home record could ultimately decide the destiny come the end of April.
Speaking ahead of the fixture with Leyton Orient, on the back of four consecutive victories that have seen his team return to the League One summit, Wilson commented: "At this time of the season, given our recent form, perhaps this is the worst time to be playing us, but we have to prove ourselves at home.
"We showed against Colchester what we are capable of, that took away some anxiousness, but we must build on that on Tuesday.
"Making Bramall Lane a fortress is going to be key between now and the end of the season because if you win your home matches, you won't be far away."
On the challenge his team will face against the O's, the manager added: "I know Russell (Slade) very well and he will make sure his team plays at the Lane in an organised and resolute manner.
"He is a former employee of Sheffield United so that will give him a bit more incentive, personally, to get a positive result.
"Orient won't be fearful, they will expect to cause us problems, but they must also make sure they are best equipped to handle what we will throw at them."