Here is a blind contour sketch I did (and decorated) this afternoon:
The subject is a small artists mannequin. Most interesting about this is the change that came about after I was interrupted by a phone call. The first step (head and right arm) was less in proportion than the rest of the base drawing.
Lesson? Hopefully not ‘seek interruptions’; more likely, ‘warm up and then take a short break’. Certainly a further idea to experiment with.