"We think that when people offload everything in their mind that might be hard to remember otherwise, it gives them some relief from that rumination," said lead author Michael Scullin, assistant professor of psychology and neuroscience at Baylor University. "It seems to be the act of writing it out that's the key ingredient." So consider this your PSA to purchase a notebook or writing pad to keep on your nightstand and use each day. It will prevent you from having trouble falling asleep.
If nine minutes doesn't seem like a lot to you, consider this: Scullin says that result is comparable to what people experience when using prescription sleep medications. "It's not insignificant," he says. "Getting nine extra minutes of sleep every night can actually make a real difference."
Why not try this out for yourself? It's an easy way to put your mind at ease before sleep. "It's a quick and low-cost thing you can easily do for a few days to see if it has any benefit for you," Scullin says. If trouble falling asleep is persistent, however, he recommends talking to a doctor.