What do you tell a man with two black eyes? Nothing, he's already been told twice.
I won't read a book that starts with a description of the weather. I don't read books over 300 pages, though I'll make an exception for Don Delillo.
Try not to write the parts that people skip.
Don't worry about what your mother thinks of your language.
The line of dialogue belongs to the character; the verb is the writer sticking his nose in.
I always felt, you don’t have a good time doin crime, you may as well find a job.