In his book Happier: Learn the Secrets to Daily Joy and Lasting Fulfillment, Tal Ben-Shahar writes:
In research done by Robert Emmons and Michael McCullough, those who kept a daily gratitude journal — writing down at least five things for which they were grateful — enjoyed higher levels of emotional and physical well-being.
Last year I developed a strong urge to get a Moleskine softcover 18-month planner, mostly because I couldn’t – they were all sold out. This year I found one in July at a bookstore, and it is more or less perfect for this, although there’s room for just about 5 items, but not much explanation unless you use the notes page for each week. Still, a nice use for a nice notebook!