I start writing on 11x14 bristol board sheets. I'm not sure why - it might have something to do with being able to fit a bunch of stuff on one page - It's easier to connect ideas this way. It also feels better than hunching over a laptop.
These sheets are a timeline map and bits of dialogue. I prefer handwriting over computer at the beginning because it feels like I'm drawing rather than writing.
I'll go through 5 or 6 sheets before I hit the computer (why'd you PUNCH the computer??). The story is revised MANY MANY times. Then page thumbnails, etc, etc.
Also an old sketch of Clinton.