I write on a Mac Book using Microsoft Word. I print only when I've got the whole piece together (even a whole novel) and then disappear to another corner or the terrace or Starbucks to start reading and correcting with a pen. I will edit on the computer when I've finished a scene or a chapter, but this is never the final edit. One of my favorite things is to see a printed manuscript with my handwritten notes all over it. That gives me a sense of tremendous accomplishment.