Before you begin the exercises, however, it’s important to determine your initial happiness score by completing the happiness scale below. You will revisit this scale, the Oxford Happiness Questionnaire, on a regular basis in order to track your progress—that is, to establish whether (and how successfully) the happiness activities are “working” to boost your happiness. Your initial and future scores on the Oxford scale, reflect your happiness level, not your happiness set point. The set point is fixed at birth and constant. Your happiness level, by contrast, can shift up or down depending on what you do and how you think—in other words, by the activities embodied by the 40 percent of the happiness pie chart.