The Belgium international admitted that there have been times in the past where he has taken to the field in the wrong frame of mind, but said that he was working hard on altering his outlook for the Blues.
He told the Liverpool Echo: "For me sometimes I would come into a game and think it's easy. It was a problem with my mentality which had to change and I'm working on it.
"For me football is easy but you can't play like that. In England it's difficult. Now I say every game is a big game, I say to myself 'Come on Kevin'.
"My ambition is to be a top, top player and you need to have the right attitude to become one. I know how influential I can be."
Everton travel to West Bromwich Albion this weekend.