Mentorship
Give & receive help
The people who have helped you develop, and the people you help in return, are part of what makes a career more than just a sequence of jobs.
Mentorship tends to be thought of as a formal arrangement between an experienced person and a junior one. In practice, the most useful mentoring relationships are often more informal: a conversation with someone who has navigated something you are about to navigate, a person who asks you better questions than you ask yourself, or someone who tells you honestly what they see in you.
At different stages, you are on both sides of this. You are receiving guidance from people who are further along, and you are giving it to people who are earlier in their path. Both matter and both teach you things. The act of articulating what you know, for someone who needs to hear it, is one of the clearest ways to understand what you actually know.
Mentorship also includes sponsorship: not just advice but active support, introductions, and the willingness to put your name behind someone. Knowing who has done that for you, and thinking about who you do it for, is a meaningful dimension of professional life.