Honor thy error as a hidden intention.
When you make something you are always offering some choices and denying others.
For the world to be interesting, you have to be manipulating it all the time.
Look closely at the most embarrassing details, and amplify them.
Repetition doesn't really exist
The problem with improvisation is, of course, that everyone just slips into their comfort zone and does sort of the easy thing to do, the most obvious thing to do with your instrument.