From an order value of 50 € you can order free of charge in DE
If you brood over your head as you fall asleep or in the middle of the night, you won't solve any problems. Rather think of a nice experience on a trip, doing sports or with your family or even a sense of achievement at work. With a little practice, you will succeed. And the next morning, after a good night's sleep, you will often spontaneously find the solution to your problem.