This sketch is done by placing the pencil onto the paper and not lifting it until the sketch is finished. Look for lines and shapes. Follow the contours that define the subject and the shadows around it. Doing a contour sketch is truly an exercise in putting observation into practice!
STEP 1 Start With the Most Obvious Darks
With a soft-lead pencil, sketch the most noticeable darks of the subject. In this case, the interior of the mug, along the rim, and down the right on the outside of the mug are the darkest areas. Keep your pencil strokes close together so areas will look black.
STEP 2 Add More Darks
Continue adding darks, using them to define the image.
STEP 3 Add a Background
Finish adding darks to complete the mug. Add a background and some shadows to further define the image.