As much as you think you know, you don’t know it all. There are people with more experience than you, and with that experience comes knowledge. To get access to it, you need experienced colleagues, in addition to your peers, in your network. Establish a relationship with a mentor who can guide you through your career. In addition to advising you on how to advance, a mentor can help you learn about an occupation you are considering, get the lowdown on an employer before a job interview, and solve problems at work.