Sam Allardyce has called for a clinical display from his side when they take on West Bromwich Albion at the Boleyn Ground on Saturday.
The Hammers welcome the Baggies to east London as they look to notch a tenth Barclays Premier League win of the season.
But having drawn a blank in their last fixture - a 2-0 defeat at Chelsea - the boss wants his side to display a more ruthless streak on this occasion.
He said: "It's always worrying if you don't take your chances because you saw what happened to England in the week - they dominated the opposition [in the first half], created chance after chance after chance and only scored one goal.
"They then had to be satisfied with a draw from a game in which they should have been out of sight by half time, because they haven't got that cutting edge at the moment. You can end up getting kicked where it hurts.
"We've had many a game like what happened to England this season, particularly away from home, where we've been the dominant force for long periods and haven't taken advantage of it.
"Putting the ball in the back of the net to show the dominant time you've had is critical in the Premier League. That we haven't done that is why we're not safe already."
Allardyce will be wary of the threat posed by West Brom's 13-goal leading scorer Romelu Lukaku, although he believes his team possess an equally big threat in the shape of Andy Carroll.
He continued: "Lukaku has had a tremendous season for West Brom and I think it's a major bonus for Clarky that he's picked up a player who initially comes off the subs bench and scores, and then gets into the starting eleven and continues to score.
"He's been a tremendous asset for them and their success this season - particularly in the early part of the season, that's where they established themselves.
"It was a little bit like ourselves, but they did better than us. I think we got 14 points out of the first eight games, they got 18 or something like that.
"They've had their ups and downs since then, like we have, but the fact that he's continued to score goals all season is why they've had such a good season.
"Andy Carroll has proven [his goalscoring ability] at Newcastle. When he left there for Liverpool he'd already notched eleven goals that season.
"This whole season has been a bit disrupted for him and hasn't allowed him to express his full potential. Hopefully that will grow and continue to grow if he stays fit for the rest of the season.
"I thought he played well at Chelsea but didn't put one in the back of the net from the two or three chances he had. Hopefully he'll keep getting the chances and the goals will come."