Toby Campbell MD, who created an Oncotalk spinoff called WiTalk at the University of Wisconsin-Madison, opens his workshops with an improv exercise. Brilliant! At some level, we're all improvising, aren't we? From the perspective of expertise, the improv might be seen as something that happens at the higher levels, as an ingredient in adaptive expertise--what experts do at the edge of what they know exactly. But the improv angle adds an emphasis on working in the moment. After searching for years (!), i've finally found a book i can recommend: Do Improvise is a terrific read, with the best descriptions of how to run an improv exercise i've read anywhere.