Lifted from Susan Albert's interesting blog about writing and life:
Practice is essential. If you’re going to learn to write, it has to be your practice. I’ve been fascinated with the job of learning to write, which is unending. And I enjoy writing. Dealing with the problems it presents gives me pleasure. Sometimes there’s frustration, but if I get frustrated or hit an impasse, I just stop and go back to it later. I don’t like to hear writers talk about how they suffer for their craft. If it’s that bad, they ought to quit.