“Some people use the 80/20 rules, meaning they stick with ‘clean’ eating 80% of the time and then the other 20% of the time they eat whatever they want. The problem is that the 80/20 becomes 60/40, then 40/60, then 20/80 and then all bets are off. Don’t follow the 80/20 rule. Follow the 100% rule—that might turn into the 99% rule and that is okay. But the 80/20 rule isn’t a rule. It’s a step down the slippery slope.”

Jocko Willink, Discipline Equals Freedom (Page 196)