In his work, Weeß emphasizes several transformative ideas about how we view and achieve rest:

: External warmth—like a warm bath or a cozy blanket—actually helps the body's core temperature drop by dilating surface blood vessels, which facilitates falling asleep.

: He recommends dimming lights 60 to 90 minutes before bed to allow natural melatonin to build.

: He highlights that roughly 80% of Germans use an alarm to wake up, effectively cutting their essential repair program short before it is finished.

: During sleep, the body performs critical maintenance, including strengthening the immune system, boosting memory, and acting as a natural defense against depression.

: Weeß notes that waking up 10 to 25 times a night is normal; the issue isn't waking up, but how you react to it.

: The book covers "sleep hygiene" basics, including managing light and sound, and dealing with common "sleep killers" like smartphones and late-night work. Schlaf wirkt Wunder - Hans-Günter Weeß - Droemer Knaur