on Publishing … and Other Forms of Insanity:
The best tip anyone can give a writer is to read. Much of the craft of writing is absorbed unconsciously by reading great authors. Don’t limit yourself to your own genre. Read fiction, nonfiction, poetry, personal essays, anything you can lay your hands on – especially authors whose style is wildly different from your own. Reading is the fuel that will light your creative fire.
The analytical process of reading is also important for writers.