http://www.evertonfc.com/news/2017/02/05/rom-how-boss-has-helped-me
Emphasis is mine.
"[...] he says the Toffees boss has played a crucial part since taking charge in the summer.
Asked what Koeman has done to help his game, Lukaku said: “Consistency. The manager now helps me with the extra details – with pressing, my running off the ball and also the mental aspect of the game.
“When he came in [as manager] we had a chat. He told me his ideas, I told him mine, and then he showed me from the start of what he wanted to do.
“He wants me to be focused at any time because he knows with my finishing, if I have the ball in the last minute I can decide the game.
“I’m a guy who works really hard on the training ground and I know hard work will pay off. That’s what the manager told me at the start of the season. I believed in his football philosophy and it helped me going forward. You always have to keep your mind open to different things.
I trust the process of what he wants to do at this football club. He helps me and I’m delivering in whatever situation he wants to play.”
Lukaku vowed to keep putting in the work to help the Blues achieve a top-six finish this season.
The Toffees now boast a seven-match league unbeaten run, with the Belgian insisting extending that form, rather than his goalscoring numbers, are his priority.
“The most important thing is to make sure the team ends the season as high as possible,” added Lukaku.
“We have to aim for the top six, we are really close, and I have to help the team.
If I can play my part that’s the best thing ever.
“I’m happy with the team. We are playing well since the start of the 2017 and we need to keep improving. I’m just focused on this moment in time. That’s
the mistake I made last year when I looked too far ahead. Now for me it’s just game after game, improve, do my job and live day by day. I know how good I can be but I’m willing to put the work in and I know I can do it.”"