A brace from Peter Odemwingie saw the Baggies to a 2-0 victory over Southampton at the Hawthorns on Monday, a win which lifted them up to fifth in the table.
"It's a bit of a cliche but we are really not getting carried away and we are taking each game as it comes, and we will see where we go" Foster told Sky Sports 1.
"We will get to the 40-point mark as soon as possible we and see what games we have got left."
A last gasp deflected strike denied Steve Clarke's side last week, but West Brom showed no sign of feeling sorry for themselves.
"Fantastic credit to bounce back after two difficult weeks," Foster continued. "We were unlucky against (Manchester) City and we conceded in the last minute last week, against Newcastle so it was great to bounce back and we thoroughly deserved the win."
Nigel Adkins admits he should be favourite to get the sack because of Southampton's precarious position in the Barclays Premier League but has pleaded not to be given "the dreaded vote of confidence".
Adkins said: "I don't think anybody needs to give anyone a vote of confidence because if you do, then we all turn around and say, 'he's got the dreaded vote of confidence'.
"We need to win and I believe we can do it. I'm very proud and privileged to be the Southampton manager. I'll stand out and lead from the front as I've always done.
"I'm very positive. I know I'm a better manager today than when I joined Southampton. I know I've improved a lot.
"But someone is always going to be the favourite [to be sacked], and if you're bottom of the league, well, you should be the favourite probably.
"I'm not going to hide away from that. But what a great challenge we face."
Adkins insists he will remain positive about the battle ahead to survive in the top flight.
He said: "We're going to embrace it with positivity. If I don't believe we can do it, then the players aren't going to believe we can do it.
"We've played eight of the top 10. I'm looking forward to the fixtures we've got coming up."
Lambert dropped goalkeeper Artur Boruc, who has been the subject of a club investigation into allegedly throwing a water bottle into the crowd during the recent game with Tottenham.
Adkins said: "There is an internal investigation going on and I'd like to think that would be concluded quickly.
"Because of that, he has not been selected tonight."
Albion are up to fifth place in the table after bouncing back from injury-time defeats against Manchester City and Newcastle.
But Baggies boss Steve Clarke is refusing to get carried away with a points tally of 17 from the first 10 games.
He said: "I'm happy. The performances were good in the last two games but we got no points.
"It was just important to get back on track tonight. The performance was okay. It wasn't exceptional but okay.
"We had good control of the game, especially in the second half. We didn't look under too much threat and always looked like we could score on the counter-attack."
Clarke added: "Seventeen points from 10 games is good and we are a good way to being comfortable.
"But, if we hadn't won tonight, the league starts to tighten up and you always have to be careful in the Premier League.
"Once you get complacent and setting your sights too high, it's got a habit of coming back to bite you. We won't do that."