When you call for your players to roll Perception checks, do you pull those who succeed aside, or do you simply look at them and say, "You see/hear...?"(You can find the answers from some of Paizo's staff here).
My approach to this is I usually ask the player whether he wants me to reveal the information that he just saw/heard to his fellow characters. So it mostly depends on that character.
It is quite a waste of time to pull aside a player to tell them that he saw an ambush waiting for them when telling the party right away would be more effective. However, when the rogue is searching or sees a treasure that the rest of the party's missed then it becomes another story.
So what would you do?