Good writers are visible just behind their words. - William Zinsser

Writing is learned by imitation. I learned to write mainly by reading writers who were doing the kind of writing I wanted to do and by trying to figure out how they did it. S. J. Perelman told me that when he was starting out he could have been arrested for imitating Ring Lardner. Woody Allen could have been arrested for imitating S. J. Perelman. And who hasn’t tried to imitate Woody Allen? Students often feel guilty about modeling their writing on someone else’s writing. They think it’s unethical — which is commendable. Or they’re afraid they’ll lose their own identity. The point, however, is that we eventually move beyond our models; we take what we need and then we shed those skins and become who we are supposed to become.

Clichés are the enemy of taste.

This is a book by a writer who does some teaching, not a book by a teacher who does some writing, and one of the satisfactions of the craft is that there's always something new to learn.