Any unexplained phenomenon passes through three stages before the reality of it is accepted. During the first stage it is considered laughable. During the second stage, it is adamantly opposed. Finally, during the third stage, it is accepted as self-evident. - Arthur Schopenhauer
Crucial importance of willpower/self-control/conscientiousness/grit. Mindset. Mental contrasting, implementation intentions, wooping. ‘Driving the bus’.
Note there are already a number of resources available on this website that are relevant for "Willpower & Making It Happen". Look, for example, in the "Wellbeing, time management, self-control & self-determination" section in this website's "Good knowledge" area.