The former Chesterfield and Oldham boss replaced Carl Fletcher in the managerial hot seat this week and the 48-year-old is hoping the feel-good factor around his appointment this week can help inspire his team to a vital three points.
"If we get three points on Saturday everyone's attitude will change," he told Press Association Sport. "Winning football matches gives everyone a buzz and a lift and that is something we need to get quickly now.
"If we win games and win them quickly we'll turn the corner and have people in a positive manner thinking we can stay safe and that is all I'll be talking about.
"I think having a new manager is usually beneficial because when a new manager goes in (to a club) they usually get a positive result. I don't know why that is but I hope that works on Saturday."
After welcoming Morecambe to Devon and travelling to Southend, two of Argyle's next three matches are also on home soil against Accrington and then Dagenham - a run of matches Sheridan believes can help them move from second-bottom in the Football League.
"I'll be looking at the next three or four games very strongly - they could be a big turning point in our season," he said.
"I have got a points tally in my head that I'd like to take from those games and I think we'll get it.
"It is a very evenly matched league and there is nothing stopping us going on a three or four-game winning streak and that is what I'll be telling the players."
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