Define your 6 Fs (or personal equivalent) before optimizing anything else
Scheinman's fitness standard — 175 lbs, 10% body fat, 32-inch waist, not injured, able to do whatever he wants — is precise enough to evaluate any proposed training or nutrition change against. His finance standard ('enough money to do what I want, when I want, with who I want, for as long as I want') is a freedom metric rather than an accumulation target. Both standards tell him immediately whether a trade-off is worth making. Lyon's parallel from clinical practice: 'if you tell me that your family is your number one priority and you don't take care of your health, you're not telling the truth.'
What's most important? What is that for me? That became the 6 Fs. For years it was salary and title... the hustle and grind 24/7... and that transitioned into the 6 Fs.

