Job design researchers advocate that jobs should be interesting, that is they should involve tasks that are meaningful and have significance. However, all jobs contain tasks that may be meaningful and significant and essential to organizations’ operation but not enjoyed by the employee. We refer to these tasks as non-preferred work tasks (NPWT). In this chapter, we draw on Conservation of Resources (COR) Theory to develop a conceptual model proposing that the intensity and frequency of non-preferred work tasks reduces employees’ propensity to engage in extra-role discretionary work behavior, and that job crafting and emotional state moderate this relationship.