In my experience with students—talented students of writing — the most important thing for them to remember is that someone who is not them and cannot read their mind is going to have to read this. In order to write effectively, you don’t pretend it’s a letter to some individual you know, but you never forget that what you’re engaged in is a communication to another human being. The bromide associated with this is that the reader cannot read your mind. The reader cannot read your mind. That would be the biggest one.
Probably the second biggest one is learning to pay attention in different ways. Not just reading a lot, but paying attention to the way the sentences are put together, the clauses are joined, the way the sentences go to make up a paragraph.
This act of paying attention, Wallace argues, is a matter of slowing oneself down. Echoing Mary Gordon’s case for writing by hand, he tells Garner:
The writing writing that I do is longhand. . . . The first two or three drafts are always longhand. . . . I can type very much faster than I can write. And writing makes me slow down in a way that helps me pay attention.
David Foster Wallace, Quack This Way
via Brain Pickings