Nigel Clough is urging his players to take charge of their own destiny and not rely on Rochdale slipping up.
The Blades need only a point from games against Leyton Orient and Chesterfield to make sure of a top six finish, whilst Rochdale must beat MK Dons and Barnsley, but Clough says United can't be thinking about anything else other than getting the job completed at the weekend.
He remarked: "We don't want to leave anything to chance, we must go to Orient, be positive and try and take care of our own business, it is a tall order for Rochdale, but they still have hope at the moment. MK Dons need to win at Rochdale to keep on Preston's heels but if we get a point or better at Orient then we know we are fine.
"We need a clean sheet against Orient or Chesterfield, in simple terms. A point at Yeovil would have been enough when you look back, that's what we mean by good points on the road."
The Blades boss has admitted he is surprised to see the O's in relegation trouble, especially when they came so close to winning promotion to the Championship via the play-offs last term.
On the weekend's opposition, Clough added: "When you look at Orient's squad on paper it is very similar, if not better, to the one that lost to Rotherham in the play-off final last season.
"You can point to Russell Slade's departure and that probably shows just how good a job he did to get them so close last season.
"Instability off the field contributes to poor results on it, not many teams can handle the problems throughout a season and still get positive results."