What: Starting with the largest masses (sphere, cylinder, cube) before any detail.
Why: It secures correct proportion and composition before you commit to misplaced detail.
How: Summarise the subject in 3–4 light basic shapes, correct their proportions, then carve detail within them.
Common mistake: Starting with the eye or a favourite detail, so proportions collapse.
Exercise: Draw a head starting from the cranial ball and face plane only in one minute, then add features.