@olly.rosewell: Signups feel amazing and tell you nothing. Track activation instead, the percent of new users who do the one action that makes your app useful on day one. Then just three more numbers: 30 day retention, monthly revenue, and customers lost. - Ignore raw signups - Define one key action - Measure activation weekly - Track four numbers only - Change one thing at a time #saas #startup #software #entrepreneur #buildinpublic