"We've got it into our heads that we've got a big match every week and it does not matter what the starting line-up is," said O'Gara, who is hoping to be a part of his third successive Lion stour this summer.
"But we've got to be realistic too because there are half a dozen of the players who have got a maximum of three years left at the top before they move on. We want to collect as many winner's medals as possible.
"We were pretty confident at half-time and the great thing about this team is we can now score points from wherever.
"The forwards were immense and we were ruthless but the Ospreys were chasing the game and they fell apart. These are the games you want to play in, but it was strange because it felt no different to a Magners League match."