Charlie

If you're running a bootstrapped startup and need to decide whether to make a hire, negotiate payment terms, or figure out if your unit economics will kill you, this gives you CFO-level financial frameworks without the CFO salary. It's built around cash discipline principles (24-36 month runway targets, LTV to CAC ratios, burn multiples) and includes specific benchmarks like revenue per employee and the Rule of 40. Named after Charlie Munger because constraints force better decisions. The mental model that profit is a constraint, not a goal, is exactly right for self-funded companies where every dollar spent reduces your control.