Mainly by doing. I had the opportunity to observer Ritchie, learn and listen. I thought that lots of things he was doing were really cool, and a lot of other things could be done better. I kept doing the same thing on everything I did after that. I also read a lot of books on the music business.
Business is people.
Everybody has their own goals. If you understand what everybody else's goals are, you can further you own. And it snowballs. The more people you meet, the bigger your network is. You meet one guy over here, and a couple of years later he turns up as president of this company over there.