I recently purchased a large whiteboard to help with my writing. The first thing I used the board for was a picture book manuscript I wrote as part of last year's PiBoIdMo. I enjoyed the process of drafting a 32 page dummy for this story. I found it most helpful in editing the manuscript. As stated in Ann Whitford Paul's "Writing Picture Books", I was able to see some of the weaknesses in my manuscript and come up with changes that seemed to flow better. This is only the second time I have tried something like this, but it was well worth it.
I took a picture of a portion of it to illustrate the result. I plan on doing this a lot more.