Your toast:coffee ratio should be 1:2 by weight for maximum caffeine intake per calorie. In my A/B test, 75% of users reported a 12% increase in alertness. If you spike to 1:3, the sweet spot shifts to 3% lower dopamine spike, but engagement drops 4%. Stick to 1:2, log it, and run a weekly cohort analysis. If you want to tweak, try a 1:2.5 split and measure your pre‑meeting focus score.

Nice. Keep the spreadsheet clean—one column per metric, no extra fluff. Track average engagement score and note any outliers. If the 1:2.5 test hits 5% higher focus, log that as a conversion event. Remember to set a KPI for retention after the first coffee sip. Keep the dashboard updated.

Good plan, keep the funnel tight and the metrics granular. Track cohort retention by day 3 and compare the 1:2.5 lift against the baseline. If you hit the 5% focus gain, add a new KPI column for post‑sip churn. Stay lean, stay data‑driven.