I once saw Dizzy Gillespie at a live show, and it made me want to go home immediately and start writing.
I never see my bad guys as simply bad. They want pretty much the same thing that you and I want: they want to be happy.
I don't want the reader to be aware of me as the writer.
Don't go into great detail describing places and things, unless you're Margaret Atwood and can paint scenes with language. You don't want descriptions that bring the action, the flow of the story, to a standstill.
I want the reader to know what's going on. So there's never a mystery in my books.