A negative emotional state can really ruin your day. Prolonged stress, depression, or anger are clearly not conducive to high levels of performance. And the worst part is that these emotional states tend to be self-perpetuating. Working while overly stressed can lead to even more stress. Depression and worry can cause you to avoid taking the kinds of actions that will help you escape the pit of negativity. And anger can lead you to take unproductive actions you may later regret.

While emotional variety can spice up your life, hopefully you