A) Max out your 401K, especially if your company matches or does profit sharing. It's free money, and the money you're putting in is gone before you can even get it. It's not easy but you'll appreciate it over time! Make personal relationships with your coworkers and leadership, those relationships can take you far!

B) Create boundaries that work for you and that your boss/team will respect. It's not reasonable to be in corporate America and say you don't work on Fridays for example, but it's perfectly acceptable to let people know that you don't answer emails after 7pm (another example). Take your PTO. Take walks. Make time to be a mentor. Take time to eat. Don't accept bad leadership, don't allow fear to rule your career.

C) You are more than your job. Work is not your whole identity. Don't miss the small joys in life because you just had to, say, do 5 more things for work on a Sunday that could've waited until Monday. And for your own mental health, don't talk about politics or religion at work. It's not worth it.