The biggest challenge for even the most focused, though, comes from the emotional turmoil of our lives, like a recent blowup in a close relationship that keeps intruding into your thoughts. Such thoughts barge in for a good reason: to get us to think through what to do about what’s upsetting us. The dividing line between fruitless rumination and productive reflection lies in whether or not we come up with some tentative solution or insight and then can let those distressing thoughts go—or if, on the other hand, we just keep obsessing over the same loop of worry.
