We all have our own personal writing styles, but in case you find it useful, here’s mine:
I always write the dialogue LAST, after all the other parts of a chapter. Oh, I keep in mind a vague idea of what all the characters say, but I don’t write it down until I feel I know all the important details. Often I just write “placeholder” dialogue (very short and to point, often sounding quite unnatural and dull) to be later updated, taking in consideration the characters’ personalities, and what they know (or don’t) about the current situation they’re in. Also, keep dialogue simple; real people don’t usually go into extensive detail about stuff they already know (unless it fits their personality.) See YUGIOH as an example of how NOT to do naturally sounding dialogue:
Yugi’s opponent: “HAH! You’re doomed, Yugi! With this card that (goes into extensive detail about what the card does) I’ll defeat you next turn!!”
Yugi: “Oh, no! He used the card that (goes into extensive detail about what the card does)! But I’ve got a card that (goes into extensive detail about what the card does) will undo it!”
Yugi’s opponent: “Oh, no! He used a card that (goes into extensive detail about what the card does) undoing my card that (goes into extensive detail about what the card does)!!”
Wil: “Hey guys, we heard you the first time, would you please GET ON WITH THE STORY??”
Yugi: “Sorry, we’re just killing time to stretch the duel over several episodes because we’re adapting a storyline that isn’t finished in the Manga yet.”
Wil: !@#$ing Manga adaptations!!
:hahaha;