Imagine that in 1960 an elf let you in on a secret: For the next 50 years computers would shrink drastically and cheapen yearly on a predictable basis. Subsequently, whenever you needed to make a technological decision, if you had counted on the smaller and cheaper, you would have always been right. Indeed you could have performed financial miracles knowing little more than this rule. Here is today's secret: In the coming 50 years, the net will expand and thicken yearly on a predictable basis--its value growing exponentially as it embraces more members, and its costs of transactions drop toward zero. Whenever you need to make a technological decision, if you err on the side of choosing the more connected, the more open system, the more widely linked standard, you will always be right.