1. What is improvisation? -- 2. Rules -- 3. How to improvise -- 4. "What about my partner?" -- 5. Context and scenes -- 6. Common problems -- 7. More than two people in a scene -- 8. Advanced improvisation -- 9. Advice and guidelines for improvisers -- 10. Improvisation and the second law of thermodynamics -- 11. Exercises to do at home -- 12. Annoyance.