Never use a verb other than "said" to carry dialogue... I once noticed Mary McCarthy ending a line of dialogue with "she asseverated" and had to stop reading and go to the dictionary.
Elmore LeonardMy characters have to talk, or they're out. They audition in early scenes. If they can't talk, they're given less to do, or thrown out.
Elmore LeonardIf you take a few days to write an outline, you're just making up scenes that you think will work, that you think will be interesting. But as you write it, other ideas occur - better ideas that have to do with what you're writing.
Elmore Leonard