"I'm sure I will get better this season," the Dutchman told the Daily Post. "Last year I didn't have a full pre-season or know the rest of the lads or the club so well. Now I'm more settled and any difficulties when starting at a new club are behind me. I can focus 100 per cent on my football and I have a good feeling about this season.
"I scored a lot of goals in Holland, but England is totally different because it's so much more difficult. I believe I can do here what I did in Holland, but I also think I can do more for the team than just score goals. It's important for me to do whatever job is asked, working hard or making assists.
"Last season was different for me, getting used to different partners in attack and also playing against better defenders. The Premiership has some of the best defenders in the world and you need to get used to that, but I'm looking forward to this season even more than last.
"Andriy and Fernando are different strikers to Robbie Fowler and Bellamy, so I may play in a different role. Fernando likes to come deeper for the ball, so if I play alongside him there's the chance for me to play higher up the park, which I enjoy.
"That's more how I was used to playing with Feyenoord. It all depends who I play alongside, of course, but what's most important is to play, win the games and help as many players as possible to score goals."