His work suggests that humans are most productive, and also most satisfied, when they are totally absorbed in a clear but challenging task which they are capable of completing. The suggested conditions necessary to achieve the flow state are

1. ???One must be involved in an activity with a clear set of goals. This adds direction and structure to the task.
2. One must have a good balance between the perceived challenges of the task at hand and his or her ownperceived skills. One must have confidence that he or she is capable to do the task at hand.
3. The task at hand must have clear and immediate feedback. This helps the person negotiate any changing demands and allows him or her to adjust his or her performance to maintain the flow state.???

Most work doesn???t meet these criteria and so ???flow??? is not all that common, but it is amongst the best states of mind a human can hope to achieve.