9. Thinking (Knowing) Your Boss Is An Idiot
When you have a great boss, life is sweet and full of sunshine and rainbows, but equally, when you have a bad boss who questions your faith in humanity it can ruin your mood inside and outside of the work place. You concentrate all of your energy in just getting on with your work and resisting the urge to scream and shout even when they're being a massive, arrogant, useless, condescending human being.