Making things messy from the start as advice for getting started.

I've seen this before in other settings, particularly in starting new notebooks. Some have suggested scrawling on the first page to get over the idea of perfection in a virgin notebook. I also think I've seen Ton Ziijlstra mention that his dad would ding every new car to get over the new feeling and fear of damaging it. Get the damage out of the way so you can just move on.

The fact that a notebook is damaged, messy, or used for the smallest things may be one of the benefits of a wastebook. It averts the internal need some may find for perfection in their nice notebooks or work materials.