Involvement in student organizations—particularly leadership positions—is a good way to gain experience in project management and working with teams, and presents an opportunity to learn alongside other graduate students how your skills as a PhD student transfer into other domains. Student groups generally involve a reasonable time commitment, and cover a wide array of interests. Consider joining one or more groups as a member and then, if and when the opportunity arises, move up into a leadership position. You can discover the full array of student groups via Yale Connect, and see also the GSAS student groups resources page.