Work can be tough. Even if you love your profession and have all the skill and experience in the world, you will have days that leave you feeling drained and frustrated. I know I have those days. If you say you don't, you're lying. My trick is to find something about my job that I can really take joy in. Something to get obsessed about or to turn into a game. Designers love to wax philosophical about typography. Find your Thing, the area of your profession that you can really fall in love with, and allow the joy you get from doing that bit push you over the hump when you have a rough day.
Trite? Perhaps. Helpful? Doubtful. But does it work for me? You bet.