Many have problems falling asleep in the evening. A decades-old technology is now being rediscovered by more and more people. It dates back to World War II and was once intended to make it easier for US soldiers to fall asleep. And here’s how: in a comfortable position, first relax your face. Jaw muscles, tongue, mouth. Then proceed gradually with the rest of your body. Relax shoulders and neck, then individually arms and hands. Last, again individually, the thighs, calves and feet. Now imagine one of the following pictures: you are lying in a canoe on a lake under a blue sky. Alternatively, lie in a comfortable hammock in a pitch-dark room. It is crucial to silence the thoughts. If that doesn’t work, they always say to themselves the following mantra: “Don’t think, don’t think.”In military studies, this technique was successful in 96 percent of the participants: after six weeks of practice, they were able to fall asleep within two minutes.