(…) flow is completely focused motivation.

Colloquial terms for this or similar mental states include: to be on the ball, in the moment, present, in the zone, wired in, in the groove, or keeping your head in the game .

Flow theory postulates three conditions that have to be met to achieve a flow state:

  1. One must be involved in an activity with a clear set of goals. (…)
  2. The task at hand must have clear and immediate feedback. (…)
  3. (…) One must have confidence that he or she is capable to do the task at hand.

(via Flow (psychology) – Wikipedia )