There's money in the old stuff, but there's more wealth created in the new growth areas.

I don't listen to my old stuff very often at all.

I listen to everything from Lady Gaga to Lady Antebellum. I've got Frank Sinatra. I've got old stuff, new stuff. Iggy Azalea. I've got everything.

One of my rules is: Never listen to your old stuff.

I miss the experience of walking into a record store and find old stuff without expecting to.

Most tech companies do one trick and die. If you can do two or three or four, that's where wealth gets created.