You can’t self-prime, not directly. Priming has to be unconscious; more specifically, it has to happen within what psychologists refer to as the adaptive unconscious—a place largely inaccessible. When you are driving a car, the adaptive unconscious is performing millions of calculations, predicting every moment and accommodating, adjusting your mood and manipulating organs. It does the hard work, freeing up your conscious mind to focus on executive decisions. You are always of two minds at any one moment—the higher-level rational self and the lower-level emotional self.
