The Magpies boss takes his team to Anfield on Sunday and has admitted his strikers must finish any chance they receive.
Michael Owen will be looking to get back amongst the goals as he returns to the club where he began his career.
"We'll get one chance, at least," Shearer told Sky Sports News.
"I know we haven't got a lot of time so when they come along we have to take them.
"The pleasing thing for me the other night was that we created chances.
"The disappointing thing is that we didn't take them. I said in the previous games that I was concerned that we didn't create the chances.
"Now I know that if we keep creating the chances, with the calibre of strikers such as Owen, (Mark) Viduka and (Obafemi) Martins that eventually they'll go in."
Owen has not scored in nine matches now, and Shearer admits the striker was disappointed at his miss on Monday against Portsmouth.
But Shearer feels there is no better stage for Owen to score than his former stamping ground.
"Michael was as disappointed with his miss as anyone the other night.
"But it would not be fair to not mention the ones from Oba and Mark - they were equally disappointing.
"If we do create a chance I'll be looking for one of them guys to put it in."
No pressureShearer is looking to emulate some of the other teams from the bottom half of the table that have taken points from Anfield and believes that the pressure is off his side.
"There have been a few teams, Hull, Fulham, Stoke, who have gone to Anfield and come back with points - we'll be looking to do the same.
"Some will say that the pressure is off, but I've got to instil into my players that we can go there and get something.
"We know it's going to be a very tough game at Anfield.
"We go there as underdogs - but nothing is impossible in life, underdogs have come away with results before.
"Can we keep them out? Tall order but if we do, we have to take our one chance.
"We've had a few good days' training on the way we're going to go in (to the match) and that's encouraged everyone."