In the next section we list suggested readings and activities that provide answers to these questions. The suggested readings can be used to guide the reading list for a doctoral seminar that is wholly or partially devoted to theory and theory building. Alternately, these readings can be used to guide your own learning at any stage in your career. We also present suggested learning activities that can be used as an assigned activity in a course, as a less structured activity perhaps in the context of a student-faculty mentoring relationship, or as a self-guided learning activity to be used alone or with peers.