Lack of confidence, sometimes alternating with unrealistic dreams of heroic success, often leads to procrastination, and many studies suggest that procrastinators are self-handicappers: rather than risk failure, they prefer to create conditions that make success impossible, a reflex that of course creates a vicious cycle. McClellan was also given to excessive planning, as if only the ideal battle plan were worth acting on. Procrastinators often succumb to this sort of perfectionism.

Viewed this way, procrastination starts to look less like a question of mere ignorance than like a complex mixture of weakness, ambition, and inner conflict. But some of the philosophers in “The Thief of Time” have a more radical explanation for the gap between what we want to do and what we end up doing: the person who makes plans and the person who fails to carry them out are not really the same person: they’re different parts of what the game theorist Thomas Schelling called “the divided self.” Schelling proposes that we think of ourselves not as unified selves but as different beings, jostling, contending, and bargaining for control. Ian McEwan evokes this state in his recent novel “Solar”: “At moments of important decision-making, the mind could be considered as a parliament, a debating chamber. Different factions contended, short- and long-term interests were entrenched in mutual loathing. Not only were motions tabled and opposed, certain proposals were aired in order to mask others. Sessions could be devious as well as stormy.” Similarly, Otto von Bismarck said, “Faust complained about having two souls in his breast, but I harbor a whole crowd of them and they quarrel. It is like being in a republic.” In that sense, the first step to dealing with procrastination isn’t admitting that you have a problem. It’s admitting that your “you”s have a problem.

James Surowiecki in his great New Yorker article about procrastination.