Learn to Quit (and Often)
Don't justify things. Don't put up with bad experiences.
Quitting isn't a sign of weakness, it's a sign of strength. It takes the courage that most people don't have.
And I'm not just talking about your job, but also your lifestyle, where you live, and the people in your life.
Once you quit that opens the door to new things and new people. And being in new places lets you grow and change.