Discover the ultimate financial strategies for managing your money and debt. Learn about the 20/4/10 rule for car affordability, the 10/20 rule for budgeting and debt repayment, and how Google founders use the 70/20/10 rule to accelerate learning. Compare the 70/20/10 vs 50/30/20 budgeting methods to find the best approach for your financial goals. Optimize your finances with these proven rules and strategies.