Actually, it's paying attention to the choices you make (for example, continuing to buy Macs over PCs) in domains that you are knowledgeable. I actually know a

Actually, it's paying attention to the choices you make (for example, continuing to buy Macs over PCs) in domains that you are knowledgeable. I actually know a great deal about trading, having done it professionally for a while. I only occasionally trade stocks now; I prefer angel investing...