John Cage often used Chance Procedures to make his art.
Because he did not exercise control over all of the elements of the work, the work could be bigger, stranger or more interesting than he could maybe have thought of on his own.
We can use this technique to help us step away from our selves and gain new perspective and see the world with fresh eyes.
John Cage also created Theater Piece 1 at the Black Mountain College in 1952 which brought together many different disciplines to perform together in a random performance that an is excellent example of the the “sum being greater than its parts”.
A FANTASTIC documentary about John Cage on UbuWeb where he talks about sound, music, mushrooms
More on John Cage at Wikipedia