Dr. Mathew Walker’s ‘RULES’ if you will, can be summarized in his 12 Tips For Healthy Sleep. Now that you know, without a shadow of a doubt, that taking sleep seriously effects virtually everything you do, what will you change? What’s the cost of NOT changing? Dr. Walker’s study showed that you’re literally doing the opposite of what you think when you operate with no sleep. You think you’re pulling more out of life, when in fact, you’re quite literally headed faster for death.