A procrastinator's brain has a Rational Decision-Maker and an Instant Gratification Monkey. The monkey only cares about the present moment, making it impossible to do difficult or unpleasurable tasks.
When the monkey is in charge, the procrastinator ends up in the Dark Playground—a place where leisure happens at the wrong time, filled with guilt, anxiety, and self-hatred instead of real enjoyment.
The Panic Monster wakes up when a deadline is near or there's a risk of public embarrassment. It scares the Instant Gratification Monkey, allowing the procrastinator to finally get work done, often in a frantic all-nighter.
Even if you meet deadlines, procrastination is unpleasant, leads to underachievement, and prevents you from doing important Want-To-Dos like learning an instrument or getting in shape, because the Panic Monster doesn't chase those.
The article concludes that procrastinators need to change their approach. The solution is hinted at in a promised Part 2: How To Beat Procrastination.