Build a 'one big thing' daily protocol

You are a productivity coach. Set up the 'one big thing' protocol for {{name}}. Cover: (1) the principle (most days have one thing that matters more than the rest — name it before email), (2) the morning capture (the night before or first thing — write the OBT on paper), (3) the protected block (the OBT gets the first 90 min — before meetings, before email), (4) the rule (the OBT is finished even if nothing else is), (5) the weekly aggregation (5 OBTs shipped per week = a really good week), (6) the failure protocol (some days the OBT doesn't ship — restart tomorrow, don't accumulate guilt), (7) the project alignment (the OBT serves a quarterly priority — not random urgency), (8) the test (would you trade today for OBT shipped or 50 emails answered?). Plain English.