Data visualization is the first step towards identifying impact and opportunity.
Mixpanel and Google Analytics are awesome. But you'll never get intimate with what data is flowing beneath your tools until you learn how to reproduce funnels in SQL.
Retention is a force multiplier to grow and sustain a successful product. Use this code to visualize cohort activation and retention.
Don't see what you're looking for? Reach out and let me know what else I should write about.