This is one of my other daily sketches though, and I don't have a charcoal pencil, but a little brick...thing. So it's hard to make nice lines, if you were wondering why some look so weird.
First I do a quick minute or three sketch of what I am looking at, then I go back and kind of outline it with the charcoal. After that, I use a blender and smudge the shading in really quick. Just the large areas are shaded, no details, because it's just practice!