According to the website 80,000 Hours, the typical career is just that: 80,000 hours long. That’s an almost unfathomable amount of time. But life is long too. The typical person is alive for slightly more than 4,000 weeks, and awake and conscious for the equivalent of 3,000 weeks. When you do the basic math on 80,000 hours, you discover that the average career is roughly the equivalent of 480 sleepless weeks of labor. A little bit more math, and you realize that the typical person has five waking hours of not working for every one hour of their career.
Work is too big a thing to not take seriously. But it is too small a thing to take too seriously. Your work is one-sixth of your waking existence. Your career is not your life. Behave accordingly.
I also liked Derek Thompson's advice about chasing the job you want, not the title you want to tell people you have.