It has been suggested that the Blues will be out for revenge this weekend after they were beaten 3-0 by their local rivals in the league last month.
However, Howard insists that the players must focus solely on the day and not on previous results.
"We know it is going to be battle but I don't think we are going to cloud our judgement with results which happened two or three weeks ago," said the American. "All that will do is cloud our thinking and we need to be ready for the game.
"You have to manage your emotions and the crowd and also, because it is such a big occasion, I think certain players need to calm other players down.
"From a fairytale aspect there is an element of settling scores but it is about keeping a clear head."
The Toffees are bidding to reach their first cup final since 2009 with a win over the Reds.