After five years of trying every productivity hack from Pomodoro to deep work blocks, I've concluded that most personal productivity advice is useless without first fixing your sleep schedule. I used to think I could out-discipline a chronic 6-hour sleep debt, but my focus and willpower tanked by 3 PM no matter what app I used. If you're constantly distracted, maybe the issue isn't your techniques but your biology. Do you agree that sleep is the foundation of productivity?