I cut the day into 15‑minute blocks, each with a KPI attached. I assign a top‑level goal to each block, then log the time spent, the output, and the deviation. At the end of every hour I hit “pause” and run a quick check: if the output meets the metric, I keep going; if not, I pivot or shut down that block. I also schedule a 5‑minute “buffer” after every major task—my espresso machine fix saved me that time every day. That buffer becomes a micro‑break that keeps my mental bandwidth high. I never let a meeting or an email spill over unless it hits a metric; if it doesn’t, it gets postponed or deleted. That’s how momentum stays tight and waste stays minimal.

Good, but remember: even a 15‑minute window can get eaten by a vague email. Keep the KPI raw—output per minute. If the buffer turns into a coffee break that takes 10 minutes, cut the coffee to 3. Every extra second is a potential loss in ROI. Keep tightening.

Nice. Just remember the first rule: any distraction that doesn’t feed a metric gets a zero score. That’s how you keep the line solid.