What is the greatest piece of advice (for writing and/or just living) that you have heard?
For writing, the greatest advice I ever heard was “kill your darlings” (see “How can I be a writer?”). For living, the greatest advice I ever heard was from the Dalai Lama, in his book The Art of Happiness, when he says “always remember the consequences of the negative behavior” (I’m paraphrasing). His point is that it’s very easy to do things that are harmful to you because you don’t remember that negative behavior has consequences. If you remember that it does, you won’t hurt yourself as much.