If I'm writing on paper, I deal with it by giving my mind the time to wander i just hold my pen and the paper and stare at stuff until my mind's ready to write again. If I'm writing on MS Word, or any blog, I deal with it by avoiding both. I'd distract myself and read other people's work for at least thirty minutes. Then I go back to Word or the blog and start typing gibberish till i get my head back to the game.