From time to time I struggle to fall asleep. Sometimes this is because of something to do with my sleep environment. Maybe it’s too hot or cold , for example. At other times I’ve eaten too much, too late. And now and then it’s because it’s Saturday night and I’ve been reckless and had too much booze and caffeine… again. However, most of the time my difficulties falling asleep arise from rumination on something related to work. And it turns out that I’m not alone. About 26% of US adults struggle to fall asleep at least a few times each week , and preoccupation with worries may be a key contributor to this difficulty. When we don’t get as much work done as we intend, many of us cogitate over our perceived shortcomings . This deliberation can disrupt sleep, especially among people who expect a lot from themselves . Now, I’d known that during therapy to help them sleep, people afflicted with insomnia are often advised to write lists of their sleep-related concerns. The premise is that i