I try to keep the communications lag in mind, and the lack of knowledge about what's happening in other parts of the world, but it can be VERY hard sometimes.  A combination of the age old player-knowledge/character-knowledge issue, and the presence of ABILITIES the player has (instant communication) that the character doesn't.  I just do my best to keep from abusing things and make sure I don't bitch if I ever get called on something.  Apologize and accept.