All frustrations are self-induced. The outside world can invite us to become upset, but we ultimately accept the invitation. - Don't let others add to our frustrations. Choose to be proactive not reactive.
A job is a job. It's a way to pay for a living, but that's it. Don't let it define your happiness. You work to live, not live to work. Work on what makes you happy. (I love my job, but this is a good reminder that it's not the only thing that matters).