I'm at the hard part of my book proposal. The part where I have first drafts of all six sample chapters, and now I have to revise them. Extensively. Imagine two glaciers colliding, and that's about the sound and speed of this part of the process for me. Lots of grinding and crunching and the squeals of rock hard ice compressing. And that's just to get to the place where I feel like I can sit down and do anything!
At times I think inebriation would help (certainly it's a time-honored practice of writers everywhere, and one I've used with marked success in the past), but that only works for the composition component. The editing part needs coherency and cohesion and clarity.
Sometimes I think I'm not supposed to do this right now, but if not now, then when? Boulders of insecurity roll around in my head, and I find wonderful ways to distract myself from the noise.