Dave Morris a great improviser, coach and speaker:
"impro also improves your life"!
1. Play (for the joy of it)
2. Let yourself fail (accept it, failing does not make you failure)
3. Listen (not just to ready made up answer, willing to change)
4. Say YES (it takes us somewhere, no stops)
5. Say AND (bring your brick, say yes and, not yes but...)
6. Play the game (following rules funnels the creative process)
7. Relax and have fun (yes! Do relax! Do experiment).