Say what you will about Microsoft, but it's the best training ground for anyone interested in business--any business. Experience that might take years to gain elsewhere comes in bursts of just a few weeks at Microsoft. The place is intense, the market changes constantly, and the growth is phenomenal. The things I learned about doing my job--being a manager, running a business and keeping my career on track--can be applied by anyone in any field. So no matter what industry you're in, try these lessons out. See what happens.