Yes, writing is good for you! So says this Lifehacker post, "Harness the Mental, Creative, and Emotional Benefits of Regular Writing," about NaMoWriMo.
And so is reading, and re-reading:
An article by Rob Waugh in the UK Daily Mail on Feb. 15, 2012 reported that a study, based upon interviews with readers in the U.S. and New Zealand, found that the "first time people read--or watch--through, they are focused on events and stories. The second time through, the repeated experience reignites the emotions caused by the book or film, and allows people to savor those emotions at leisure. The 'second run' can offer profound emotional benefits."
"By doing it again, people get more out of it," said Cristel Antonia Russell of American University. "Even though people are already familiar with the stories or the places, re-consuming brings new or renewed appreciation of both the object of consumption and their self."