Khawaja just need to bat time. He is so good at it, who cares if he isn't searching for a single every ball. He isn't Mike Hussey, let him play his natural game.
Hughes needs to do the reverse, he isn't a defensive batsmen. He like to have a slash and dash and let him, but try to instill in him a knowing sense of what balls to do it with.
Rogers is at his best when scoring and picking off singles and 2's. let him take his time, it isn't a race. He had the capacity to bat like Langer or Katich, he isn't a strong hitter of the ball so let him push the ball around and frequently change over strike.
Clarke is at his best when he is aggressive. But due to our collapses, I think he is caught in 2 minds.. One is stay in and build an innings, the other is attack and score quick. If our top order can conjurer up some decent runs before he enters the crease, he'll be all the better.
Smith is similar to Clarke albeit less skilled.