This guy also wrote a book... a fellow forum member read the book and said it changed his life.
Read his book half a year ago and it changed my life too. After finishing the book, I went and bought a continental bed and starting keeping regular sleeping hours also on weekends. It’s the best decision I made of 2019. The difference good sleep makes in your daily life is incredible, and as Walker states in his book, it can also influence if you spend your older years in a dementia daze or with your mental faculties more or less intact.