In almost every case, as much procrastination as possible! Even after all these years, I still ask myself, "Do I really have to write this? How much time do I have? When is the absolute latest I can start it and get it done in time?" But, invariably, once I actually make myself sit down and get to work I become totally immersed in the process, rewriting myself as I go and questioning this word or that word. I have given up on trying to set time limits on myself — it just doesn't work. Once I have my ideas together — and can put aside the procrastination — I just launch myself into it and stop when I can no longer keep going.