Writers Write have put together some advice and a great table of body language/physical cues you can use to reveal emotion.
For instance, if you were attempting to show awe you might consider showing your character:
slack-jawed, unable to move, stare etc
Of course, try not to overuse such cues, otherwise your characters will start looking like flailing cartoons.
Most importantly, context will do most of the work. For example, a shrug might suggest: confusion, disinterest or disregard, the same way a frown might show a variety of emotions.
What will really sell a scene to the reader is the whole picture.