Flow: The Psychology of Optimal Experience by Mihaly Czikszentmihalyi
"In today's world we have come to neglect the habit of writing because so many other media of communication have taken its place. Telephones and tape recorders, computers and fax machines are more efficient in conveying news. If the only point of writing were to transmit information, then it would deserve to become obsolete. But the point of writing is to create information, not simply to pass it along."
"...writing gives the mind a disciplined means of expression. It allows one to record events and experiences so that they can be easily recalled, and relived in the future. It is a way to analyze and understand experiences, a self-communication that brings order to them."
Activities that encourage flow (for me):
sewing, and creating things by hand
taking photos...observing beautiful things
reading (this is me when i was about 10)