From Mihaly Csikszentmihalyi'sFlow: The Psychology of Optimal Experience
According to theory:
people are most happy when they are in a state of flow— a state of concentration or complete absorption with the activity at hand and the situation. The idea of flow is identical to the feeling of being in the zone or in the groove.Consider this figure in the context of your job. If your job is challenging and you are highly skilled at it, you are in the state of flow and you are working optimally. If instead, you suffer a job that doesn't challenge you and/or your skill level is low, you must endure an emotional/mental state ranging from Anxiety and Worry to Apathy and Boredom.
If you're not where you want to be, maybe it's time for a change.
via Back to Work #12: Chewie's Medal is Not Canonical - 5by5