The practice that can help you past your learned bad habits of trying to edit as you write is what Elbow calls ''free writing." In free writing, the objective is to get words down on paper non-stop, usually for 15-20 minutes. No stopping, no going back, no criticizing. The goal is to get the words flowing. As the words begin to flow, the ideas will come out from the shadows and let themselves be captured on your notepad or your screen.
Now you have raw writing materials that you can begin to work with using the critical mind that you've persuaded to sit on the side and watch quietly. Most likely, you will believe that this will take more time than you actually have and you will end up staring blankly at the pages as the deadline draws near.
What does the underlined "that" refer to? Plus, "persuaded" here makes no sense.