People rarely stand still and speak. They wave their arms, they pace, they scuff their feet, check their nails, get distracted or even make a cup of tea. I know these are all rather cliched examples but they serve the point. When writing dialogue have your characters do things whilst they speak.

Spend some time people watching and observe for yourself the things they do when they talk. Keep in mind Anne fine’s words:

 “Don’t write about people you know, write what you know about people.” Anne Fine

And what better way to find out about people than to watch them.

“A rough estimate would be one third dialogue, one third action and one third introspection.” Diane Doubtfire

Introspection are the character’s inner thoughts.

“A character’s thoughts can greatly enhance a story: deepening characterisation, increasing tension, and widening the scope of a story.” Nancy Kress

So next time you are out and about observe some of the little actions people do that hint at their character. It all adds to the story.