Here's something that's been bothering me for a while in trying to get my novel finished. I'm writing along, doing a scene where two or more characters are in dialogue, and in my mind, I "see" much of their attitude and expression in terms of their facial expressions.

I'm having a hard time getting that down on paper. "He frowned. He grimaced. He smirked. He smiled. He grinned..." After a while, I run out of "facial expression" words, and none of them have quite captured the particular nuance I'm after. Frustrating.

What does everyone else do? Not lean so heavily on descriptions of facial expressions? Expand their vocabulary? Use other forms of body language to convey the same idea?