The twelve principles

1. Satisfy Customers Through Early and Continous Delivery
2. Welcome changing requirements even late in the project
3. Deliver Value Frequently
4. Break the Silos of your project
5. Build Projects Around Motivated Individuals
6. The most effective way of communication is face-to-face
7. Working with Software is the Primary measure of Progress
8. Maintain a sustainable Working pace
9. Continuous Excellence Enhances Agility
10. Simplicity is Essential
11. Self-organizing Teams generate most value
12. Regularly reflect and adjust your way of work to boost effectiveness.

Sources

Businessmap