Keep your place
Work in manageable intervals and mark a stopping point lightly. Check the next number before making a long connection. Accuracy grows from a consistent routine rather than rushing to recognise the subject.
Observe emerging shapes
Pause to look at the larger outline and its negative spaces. Compare a region's local marks with the developing whole. The exercise can train attention to relationships that are easy to miss in freehand drawing.
Finish without crowding
After completing the sequence, decide whether added tone or colour contributes to the image. Preserve some open space so the line structure stays legible.