I never get writer's block! I wish I would, so I could rest! Seriously, if you mean on those days when it feels like there are no words in my head for what I'm trying to put on paper, it's simply a matter of closing my eyes and visually what i want to say. I also like the trick of ending in the middle of a paragraph so that the next day's work is easier to pick up. I'm also a fan of outlining a novel so that I always know the structure of the book, even though the characters will always take it off in directions of their own choosing. I simply change the outline and keep up to them.