Every trader has made the same fundamental error at some time in their career. Actually, most businessmen and entrepreneurs make this same mistake.

Let me tell you a story: While at graduate school, I was crazy about windsurfing. Whenever it was windy, I was sailing. Nothing else mattered. Classes, assignments, term papers, labs and everything else took a back seat. If it weren't for my marks, I would have been kicked out for sure.

Ask yourself "How can anyone get decent marks with that kind of focus?