The best cure I've found for either writer's block or procrastination is to begin writing everything down in whatever order it comes to you.

It's kind of like building the marble block before you get out your carving tools - very inefficient, but at least it gives you something to hack away at.

Back when I was writing all the time, I built what I needed as I went. Perceiving the next piece as I wrote, and pulling only the solid nuggets from my pad. Now I'm resorting to plan B: Spew, spew, spew.