It is about how the task feels, not how disciplined you are
The most useful shift in procrastination research over the last two decades is the move from a self-control model to an emotion regulation model. The work of Tim Pychyl and Fuschia Sirois frames procrastination as short-term mood repair: a task provokes an unpleasant feeling (boredom, anxiety, resentment, the fear of doing it badly) and delaying it makes that feeling go away right now, at a cost you will pay later. You are not failing to work. You are successfully avoiding a feeling.
This explains the pattern everyone recognizes and no discipline-based account handles: people procrastinate on specific tasks, not on all tasks equally, and the tasks they avoid are reliably the ones that feel bad rather than the ones that are objectively hardest. It also explains why procrastinators often produce bursts of intense work. Capacity was never the constraint.
The practical consequence is that interventions should target the feeling and the starting cost, not your character. Every technique below does one of those two things.