There is growing awareness of the importance of dispositional attributes to effective performance, both during college and in the workplace. In this paper, we examine multiple facets of dispositional learning such as fluid intelligence and interpersonal and intrapersonal competencies, and explain why participation in well-designed high-impact practices (HIPs)--activities such as learning communities, service learning, undergraduate research, and community engagement--can help students cultivate conscientiousness, resilience, self-regulation, reflection and other learning dispositions. In addition, we demonstrate how and why the use of ePortfolio practice can extend, deepen, and document the impact of HIPs on these essential but often overlooked and difficult-to-measure attributes.