This was my goal for the last seven months (since I read that book) and recently I decided to not use an alarm clock to wake up and instead be more careful of w

This was my goal for the last seven months (since I read that book) and recently I decided to not use an alarm clock to wake up and instead be more careful of when I go to bed. I now sleep around 8h/night (so nearly 9h in bed) and i feel still energetic in the afternoons and evenings unlike when I was forcing myself to wake up early.