Start with the problem you're actually facing
Pick the lesson that matches the question you've got today. Read the explanation, work through the example and then test it against your own records. You don't have to start at lesson one.
What counts as a useful lesson?
You should leave with a better question, one practical change to try or a clearer reason not to do something. If you can't turn the lesson into a decision, keep investigating the problem rather than adding another task to the calendar.
About the frameworks
You'll find established ideas such as the Pareto principle, the Ansoff Matrix and SPIN questioning, alongside practical checks I use to explain commercial decisions. A named model belongs to its original author. None of the numbered rules is a guarantee, and different versions can circulate under the same name.
About the examples
Where I use a business, customer or set of figures to work through a decision, it's an illustration, not a claim about a client I've worked with. Check your own costs, customers and capacity before applying the conclusion.
Your working notes
The worksheets and calculators run in your browser. They're not sent to me. Notes stay on your device only if you choose to save them there. Don't enter confidential customer or business records.
Do I need to sign up?
You can read lesson previews and one complete sample lesson in each category without registering. Free Business of Growth signup unlocks all exercises and quizzes and includes the Growth Diagnostic. Ongoing marketing emails are optional.
Be sensible with specialised decisions
The library gives general business education. Decisions about financing, investments, employment, taxes and law may need qualified advice for your circumstances. No online lesson replaces that judgement.
Your next move
Choose one thing you can check this week. Be clear about the starting point, the change, who owns it and when you'll review it. If the facts tell a different story, change the plan.