Valerian Ismael admits his side made too many mistakes in their 1-1 draw with Millwall.
Karlon Grant missed the chance to give Albion the lead from the spot before Kyle Bartley gave the Baggies the lead.
But Milwall equalised six minutes later and wasted some glorious chances to take all three points from The Hawthorns.
“We have to learn from that game," The Baggies boss told the club's website.
"We will face this type of test plenty of times in the season when opponents come to The Hawthorns.
“They want to make us frustrated and take all of the intensity out of the game.
“Our purpose from that game is to learn from what happened and make sure we maintain our intensity.
“We want to always put the opponent under pressure, like we did in a better way in the second half.
“I think we made too many mistakes. We were unsure in the defensive line and we allowed the opponent to always have a chance of coming back into the game.
“We know we have the quality to score at any time in the game but on Saturday I don’t think our decision making was as good as it could have been.
“We took too many touches and weren’t clinical in the final third.
“At the other end, we conceded too many corners and free-kicks and we knew Millwall would be a threat from those types of situations and that’s where their goal has come from unfortunately.
“Again that is something we have to learn from.
“When we get ourselves ahead, we have to stay on the front foot. We have to take the right decisions and the right direction. We have to be ruthless.
“We wanted to win on Saturday and we weren’t able to do that. We’ve seen how difficult the Championship can be and you have to take it one game at a time.”