Notes
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Break-even ROAS is one divided by your margin A 40% margin needs 2.5×. A 15% margin needs 6.67×. There is no industry benchmark that survives that spread. Three estimates from one hard effort A maximum heart rate, a one-rep max and a race pace are all extrapolations. None of them needs testing to destruction. Open rates stopped meaning what they meant A tracking pixel that gets pre-loaded is not a person reading an email. Clicks survived the change intact. One number for where you stand Net worth is everything owned minus everything owed. The 50/30/20 rule is how it moves, and it breaks where housing is expensive. Ninety minutes is an average, not a schedule Sleep cycles run 70 to 120 minutes and shift through the night. Total sleep matters far more than where the alarm lands. The chain from impression to sale Five metrics measuring one funnel at five points. Knowing which link is weak decides what you fix. Splitting a calorie target into macros Only one of the three has an evidence-based target. The other two divide what is left, and the ratio matters less than people think. LTV, CAC and the ratio everyone quotes Three to one is the number people repeat. Whether it means anything depends entirely on which LTV they used. Measuring shape rather than mass A tape measure tells you something a scale cannot. Where the fat sits matters as much as how much of it there is. Price per unit, and the threshold that pays for itself The bigger pack is only cheaper if it gets used, and free shipping only works if it comes out of margin rather than revenue. Why the minimum payment never ends It is a percentage of the balance, so it falls as the balance falls. A fixed payment is what finishes a card. What your body burns doing nothing Basal rate is most of your daily expenditure, and a 45-minute jog adds less to it than the arithmetic suggests.
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