Here's a useful tip for my fellow fiction writers, one you probably already know, but let's share it anyway. You never know when you might learn something.
Don't dump information on the reader through dialogue. It causes your dialogue to feel sophomoric—forced and unnatural.
Mary walked into the living room and tossed her keys to her son. "Danny, you can take my black Toyota Camry. But don't wreck it. And I expect you to be home by ten o'clock tonight. And stay away from Mark, the preacher's son. He's a troublemaker."
Here's an improvement:
Mary walked into the living room and tossed her keys to her son. "Danny, you can take my car, but don't wreck it. I expect you to be home by ten o'clock. And stay away from Mark. He's a troublemaker."
Granted, my example won't win any prizes for cleverness, but you get the idea. Put yourself in your character's place. Basically, if the character your character is talking to already knows the information, don't include it. Danny obviously knows the color and make of his mom's car. Undoubtedly, he also knows that Mark is the preacher's son. Find some other way of weaving that information into the story, if it's pertinent.
And while we're on dialogue, take the time to read it out loud. When you think you've got it right, take the next step and read it to your spouse, best friend or, ideally, a critique partner. If you're really brave (or masochistic) have that person read it while you listen.