I bet a lot of people already know this, but it was a surprise to me this year. The book Flow originated from happiness research. I'd always assumed it was a bo

I bet a lot of people already know this, but it was a surprise to me this year. The book Flow originated from happiness research. I'd always assumed it was a book about productivity, but it's actually a book about what activities make a person happiness. That says something important about productivity. You'll only be happy with productivity meets up with a level of challenge that puts you in a flow state. Productively doing easy tasks is boring.