The Trick of Writing

What is the trick of writing?
There's no definite answer. Writing is something that is meant to be personal. Every piece of writing holds some kind of value. Because the meaning of writing changes from time to time, there is no ONE trick to writing. But anyway, the "basic tricks" still exist.
For example, when writing an argumentative piece, the writer should provide support and valid evidence. This helps them prove their point. Use of description and being "real" should be enough to write a story or journal. However, in every single piece, writing should be a form of art. In my opinion, no matter what type of writing it is, there should be at least a little bit of humor or "art" in it.