Another new one; I snapped a few pictures during the drawing process so you could see me working with an idea. Something I tell young students, a painting isn't started until all the white (in this case, pink) is covered. I mainly tell them this to give them something very simple to achieve in the first class to break through the intimidation of starting a painting. I don't ask for quality, just coverage.
I often use a toned ground for the same purpose and to see value relationships more clearly, yet I become just as reluctant to see this new clean surface disappear. Drawing on canvas is so beautiful in itself that it could be tempting to just leave it as it is. When the ground is covered, that energy of a start does die a little, but it leads to a new, quieter, level of process.