For decades, physician and author Silke Heimes has been leading groups in therapeutic exercises to put thoughts and feelings down on paper. Heimes, a professor of journalism at Darmstadt University of Applied Sciences, points to abundant evidence that writing for five to 20 minutes a day can improve health, diminish stress, increase self-confidence and even kindle the imagination. A writing routine, she argues, is a form of mental hygiene that almost anyone can benefit from.