1. Carry a nice bag, even if the only thing in it is your lunch.
    Like coats and shoes, this is an item you want to invest in. If you look professional, you'll feel professional.
  2. Give yourself a long runway on projects
    Then, communicate with others on a need-to-know basis. This is especially effective when you have multiple stakeholders who don't understand the complexities of what you do and never will, but have endless opinions.
  3. Curate your skills.
    If there are things you're good at but hate doing, keep them to them to yourself or use them sparingly and without fanfare. Otherwise you'll put yourself on a fast track to hating your job.
  4. Identify and befriend the unseen heroes in your workplace
    The receptionists, contract negotiators, facilities managers and IT staff for starters. They know everything, are the most fun to hang with at company outings and they will hook you up. The number of people I witness treating these people as the hired help blows my mind.
  5. Hold something back
    Chances are there is some report, process, function or other thing you provide that delivers great value to your boss or team. Don't document it. Ever.
  6. Associate yourself with colleagues who are both good at their jobs and who are good people.
    I am a teacher, and this advice was given to me by a practicum teacher right before I graduated. Of course I still maintained a courteous relationship with those people on one side of the Venn diagram or the other. But the people who helped me and advanced my teaching the most were the ones in the middle.
    Suggested by @DG
  7. Write yourself a review every quarter
    Whether someone asks for it or not.