Tools of Titans: The Tactics, Routines, and Habits of Billionaires, Icons, and World-Class Performers

by Timothy Ferriss

BONER OR NO BONER? “Men, if you wake up and you don’t have a boner, there’s a problem. Yes or no? One or zero? Boner, no boner?” TF: “Quantified self” tracking doesn’t need to be complicated. It’s easy to miss the flashing red signal in front of your face while chasing the cutting edge of blood testing, genomics, etc. For men, the “boner or no boner” test is a simple but excellent indicator of sleep quality, hormonal health (GH, FSH, testosterone), circadian rhythm timing, and more. THE CAMPFIRE SQUAT TEST “If you can’t squat all the way down to the ground with your feet and knees together, then you are missing full hip and ankle range of motion. This is the mechanism causing your hip impingement, plantar fasciitis, torn Achilles, pulled calf, etc. That is the fucking problem, and you should be obsessing about [fixing] this.”