Next time you read a novel, see if a character "quirks an eyebrow" or shapes her mouth into an "O" to indicate surprise. Some people call these "received gestures," and they're a sort of shorthand to indicate emotion. Understandable as they are, they do get stale.
How can you avoid them? Well, you could check out this Emotion Thesaurus. Laurie Green has a post about it on the Spacefreighters Lounge.