The 31-year-old was a key part of the Foxes' unlikely Premier League triumph three seasons ago, netting 24 goals as Claudio Ranieri's men shocked the English top flight.
Vardy is now gearing up for the World Cup in the hope of causing another major surprise by helping England emerge victorious in Russia.
Expectations for the Three Lions are relatively low given recent disappointing performances at major tournaments but Vardy is confident it will be different this time around, having spotted similar traits to Leicester's title-winning squad.
"We were exactly the same, very close (at Leicester) having a laugh and joke at training," Vardy said.
"I think that when you are enjoying it more, you play your best football.
"We have all got that mentality where you just want to win. We want to make sure we are here as winners."
England skipper Jordan Henderson has previously said the national side should take inspiration from Leicester's title success as Gareth Southgate's men look to upset the odds in Russia.