The biggest difference between a writer and a would-be writer is their attitude toward rewriting. . . . Unwillingness to revise usually signals an amateur.
Sol SteinReaders take in dialogue one thought at a time. A frequent mistake of beginners is to combine thoughts, which may be suitable for other forms of writing but not for dialogue. Another mistake is speechifying. Three sentences at a time is tops, yet many beginners write speeches that go on and on.
Sol Stein