I also had jobs in finance, and a marketing job where I learned how to promote a product, how to sell it and how to price it. That range of experience is what helped me prepare me to start GeoCities. Education is like venture capital. The more you invest in yourself, the stronger you become and the stronger the business will be. The more you're able to understand and study a field or an area, the more you're going to be able to apply that knowledge to whatever business you're working at or starting.
Education is a continuing, life-long endeavor.
Financial reporting, product management, product marketing. People should take advantage of the courses that teach the basic skills in marketing, finance and the business concepts that are vital whether or not the Internet is around.