Super interesting with a lot of good ideas about how to write dialogue, including a lot of general conventions. Also a lot of great examples

Each character should have their own agenda, most of which conflict, dialogue should ahve purpose akin to action
Dialouge should reveal character background(education,, religion, region etc), reveal tone, action, character dynamic or story information
Exercise: watch TV commercials with no volume and improve the dialouge
Up the tension, via agenda's barriers, feats, arguments
Exercise: For characters: make a list of characters with 2 lines descriptions, make sure descriptions are sufficiently different from one another, give each one a quirk which is irritating to at least 2 other characters, write a few practice scenes pairing 2 up at random.
Subtext can be character doesn't know or reader doesn't know, can hint at, secrets, past relationships, rich backstory, socking experiences, vivid memmories, fears, hopes, yearnings
Composition, cut fluff from sentences
To slow pace, increase description between dialogue and decrease white space
To Speed up pace, decrease descriptions btween dialog and increase white space
No cursing, use context and actions to convey
Write a paragraph of your characters stating their world view/theme and then turn the contrasting themes between characters into dialouge
Quirky, memorable, light talk/comic relief in drama can be pleasing as it lightens the mood a little

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How to Write Dazzling Dialogue

James Soctt Bell