Chris Hughton was left lamenting his side's errors after Norwich lost 2-1 to Cardiff City in south Wales on Saturday.
Norwich took the lead in the fifth minute before surrendering their lead in the space of 70 seconds in the second half as Cardiff came from behind to take all three points.
Robert Snodgrass put the visitors ahead when he neatly turned home Martin Olsson's cross from the left wing.
However, the tables turned shortly after the restart as two goals in as many minutes from Craig Bellamy and Kenwyne Jones saw Cardiff to victory.
Speaking to Sky Sports, Hughton admitted: "We made the mistakes ourselves.
"There was a period in the first half I thought we were very good, we got the first goal and were comfortable enough.
"We knew that if we could continue with the good things that we did that the game would open up a little bit.
"This is one that's got away from us. I'm still scratching my head as to how we've lost this game."
Norwich should have doubled their lead moments after Snodgrass' opener as a mistake from Fabio da Silva put Gary Hooper through on goal and Hughton claims a lack of potency cost his side.
"What we probably needed in that first half was a second goal," he added.
"We didn't but we expected to come out in that second half and do much of the same again.
"But when you give away two goals in the manner that we did, it changes the game and gives them the lift."
Hughton knows picking up points away from home can be difficult but believes Norwich squandered the perfect opportunity at the Cardiff City Stadium.
"I think in any game away from home, we know that Cardiff haven't had the best of times, but any game away from home you know it's going to be tough," he said.
"You can't afford to make the mistakes that we did at that time in the game because it gives them the lift that they need.
"Especially in a game where I felt we were comfortable enough and we needed more of the same again."
The introduction of Wilfried Zaha in the first half gave Cardiff an added impetus but Hughton's side enjoyed 27 attempts on goal.
"He's a good player on the ball and he gave them another dimension," the Canaries boss claimed.
"I still felt that we had possession of the ball and there were areas where we dominated and on the break we always looked a threat.
"We kept pushing and created chances, the stats will show the amount of crosses we got into the box and the shots we got on target."
With the visit of free-scoring Manchester City next up for Norwich, Hughton believes his team must continue to put in the hard yards as they look to retain their Premier League status.
"We have to keep working as hard as we can, I don't think anybody could accuse us of a lack of effort," he added.
"We tried to get in a position to get the goals, we just need that little bit of fortune.
"More importantly, we need that bit of quality that makes a difference."