Well, the best practice that I teach in the book is actually an analytic approach. 1

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The simplest thing you can do is just cohort your customers by how much they use the product. 1You'll always see your bottom cohort churn the most when you calculate the cohort churn rate. 1It's a kind of cohort analysis, and it's always very clear that the bottom cohorts churn the most, the top cohorts churn the least. 1