I am a writer and translator as well. I have a full-time job researching/writing web content and translate freelance on the side. I agree with what seesaw said about just getting something down on paper. With my translating I do feel stuck at times just make my self sit down and go paragraph by paragraph, typing in something in the target language under each. Later I go back and revise a bunch of times, check some things in the dictionary if I need to, etc. Definitely, finding a way to push yourself to type something is the way to start.