From Fiona Maddocks’ interview with the new octogenarian, Philip Glass:
After Einstein on the Beach I went back to driving a New York cab. I didn’t mind that. It was interesting work. I didn’t have an agent. I ran all the business side of it and the box office myself. I enjoyed it. I grew up in the music business. I was happy to do it. But it took at lot of time and work. In 1979 when we did our first Carnegie Hall concert we had to pay for it, and sell the tickets! Eventually I formed a publishing company and had people doing it for me. I didn’t do it for them!
More driving tips here.