I have no interest in teaching writers how to sell. I want to teach them how to write. If the process is sound, the product will take care of itself, and sales are likely to follow.
William ZinsserBelieve in your own identity and your own opinions. Proceed with confidence, generating it, if necessary, by pure willpower. Writing is an act of ego and you might as well admit it. Use its energy to keep yourself going.
William ZinsserAll your clear and pleasing sentences will fall apart if you don't keep remembering that writing is linear and sequential, that logic is the glue that holds it together, that tension must be maintained from one sentence to the next and from one paragraph to the next and from one section to the next, and that narrative - good old-fashioned storytelling - is what should pull your readers along without their noticing the tug.
William ZinsserEvery successful piece of nonfiction should leave the reader with one provocative thought that he or she didn't have before. Not two thoughts, or five - just one. So decide what single point you want to leave in the reader's mind.
William Zinsser