Scilly tips for Sketchers
Sketching outdoors in front of the subject beats having to work solely from photographs. When working out of doors these days I do tonal studies and leave colour work for the studio. It is difficult to assess tone values when you are also considering colour. The advantage of making tonal studies is that the means of doing them is so simple. The 'Tonal Studies' link navigates to a web page that discusses the topic further - do have a look!