Shakespeare reunited with Nigel Pearson in the Hornets dugout, with the new coaching team overseeing a three-match unbeaten run.
And Shakespeare thinks there is more to come from the playing squad.
"The players have been terrific.
"That is the idea when you come in as a new management team to have that impact and get results.
"You are never quite sure, you are hoping [it will happen]. We have had a positive impact but we are also aware that it is only the start. We have to maintain the belief, the confidence, and the desire.
"We have to push on because we want to climb the table. We know that other teams are going to be there to get the points that as well."
The former Leicester coach added: "I think your home form is vitally important but I think it is important you stay competitive and try to win every game.
"What we have tried to instil is that competitive spirit, that togetherness.
"The team ethic is vitally important - not just the starting XI but the ones who don't start, because over Christmas they can play a big part.
"The whole club, culture and environment that we are trying to build and everyone is buying into, hopefully, will stand us in good stead."
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