Zen and the Art of Writing remains an excellent book for any artist to read. It would be almost impossible to not catch Bradbury's enthusiasm, running down the pages as it does. Again, just as in good fiction.
At the end of the day, writing must be balanced with the other aspects of your life. I’ve been on both sides of life: one where I have been working too hard to be able to write and one where I have worked too little to be effective at writing. The secret is balancing your zen and the art of writing.