Here's a really interesting exercise. Eaves-drop. Listen in. Snoop. Sit in a cafe or anywhere you can easily hear other people's conversations, and start writing the dialogue.
Not only does it put you in touch with a different kind of dialogue, it may give you a really great idea for a story.
If you want, you can post, in the Playwright's Gym - Feedback section. Or work something from what you hear.