Behavior is easier to change when the friction is specific
Procrastination is often discussed as a character trait, but the more actionable question is what happens immediately before the avoidance. The task may be vague, emotionally loaded, too large, badly timed or competing with a lower-friction source of reward.
Westmere tries to locate the friction before prescribing more discipline. If the problem is task ambiguity, motivation advice will often miss the point.