Build-Measure-Learn - The core idea of the Lean Startup methodology is to build a minimum viable product (MVP), measure its performance, and learn from the data to make informed decisions.

Validated Learning - Focus on validating assumptions and learning from real-world data rather than relying on speculation or intuition.

Build Incrementally - Develop products incrementally, releasing new features and updates based on feedback and data.

Fail Fast, Learn Fast - Embrace failures as opportunities to learn and iterate quickly to improve the product.

Pivot or Persevere - Be willing to pivot (change direction) or persevere (continue with the current strategy) based on the feedback and data gathered.

Lean Thinking - Apply lean principles to eliminate waste, optimize processes, and create more value with fewer resources.

Innovative Accounting - Use innovative accounting techniques to measure progress in terms of validated learning rather than traditional metrics like revenue or profit.

Continuous Deployment - Implement continuous deployment practices to quickly release new features and updates to customers.

Split Testing - Use split testing (A/B testing) to compare different versions of a product or feature and determine which one performs better.

Customer Development - Engage with customers early and often to understand their needs and preferences, and incorporate their feedback into product development.