The author Junot Díaz once said that “colleagues are a wonderful thing – but mentors, that’s where the real work gets done.” Mentorship has the potential to benefit both parties significantly – the mentor is given the opportunity to reflect on his or her own career path and impart hard-learned wisdom on the mentee, who in turn can use these lessons as guideposts for his or her own career. In the spirit of mentorship and self-reflection, we asked Propeller consultants what advice they would give to their own younger selves at the beginning of their career.