A 10 Minute Sketch
As I strolled by Hong Kong’s Victoria Harbour new Star Ferry Pier yesterday, I saw workmen installing steel girders to the pier bollards. The activity seemed like it would create an interesting sketch, but I knew I would not have enough time to do a comprehensive detailed sketch. I surmised the tugboat would deposit the girders and in a short time it would leave since it was occupying a ferry dock.
To capture the essence of the activity I drew the crane and the workmen first with little details. These established the scale in my sketchbook, and quickly the rest of the tugboat followed. The building set the perspective next that lead to the skyline in the background. In 10 minutes I was able to finalize the sketch with the promenade handrail and staircase in the foreground.
Sketchingjourney's Blog 
Sometimes a quick sketch is more expressive than a detailed one. I think that is because your mind fills in the missing details.
I snapped the photo after I felt I captured the “mood” of the scene. Notice that there is a ferry behind the tugboat, which is not in my sketch, and that the visibility had become limited.