I grew up playing about 15 instruments and the way that I was able to accomplish that was by cutting my classes, hanging out in the band room all day, and going from one instrument to the next to the next, until I learned how to play everything by ear.
“We can believe that we know where the world should go. But unless we're in touch with our customers, our model of the world can diverge from reality. There's no substitute for innovation, of course, but innovation is no substitute for being in touch, either.”