Learning, Personal Development
Rule 4: Consider everything an experiment.
In my end of year letter in 2016, I pointed to Sister Corita Kent’s Immaculate Heart College Art Department Rules. It seems that John Cage was a fan too. He typed them up on Merce Cunningham’s letterhead, and they took on a second life as his own rules for students and teachers. They are worth sharing again, whomever takes the credit. 
Article: John Cage's Ten Rules for Students and Teachers