The flow state, first recognized by Hungarian psychologist, Mihály Csíkszentmihályi , is a popular term defining the state of mind achieved when immersed in an activity. It is summarized by the following points:

Intense and focused concentration on the present moment
Merging of action and awareness
Stop thinking about yourself
A sense of personal control over the situation or activity
.Lose track of time
Experience of the activity is intrinsically rewarding

Flow state activities include running ("runner's high"), gardening, surfing, playing an instrument or a sport, working with your hands, writing, among others. Achieving this state on a regular basis is associated with happiness, productivity and creativity.