Start by putting some business books on your iPod and listening to them in every spare minute you have -- while driving, while walking between classes, while waiting in line, whatever. Most books now come on CD or as an MP3 file. Here are five books that I would start with. These are "mindset books" -- they get you into the right mindset to start a business:
The Sam Walton Story, by Austin Teutsch - Tells how Sam Walton went from being a guy with one little store in Arkansas to the richest man in the world.
Dave's Way, by David Thomas - The story of Dave Thomas, the founder of Wendy's. He started as an orphan bussing tables in a restaurant, and he went on to create an empire.
Built from scratch - the subtitle says it all: "How a Couple of Regular Guys Grew The Home Depot from Nothing to $30 Billion"
Nuts!, by Kevin Freiberg - The story of Southwest Airlines.
Be my guest, by Conrad Hilton - The story of Hilton Hotels.
Also, go to a bookstore or Amazon or a library and find a basic "How to start a small business" kind of book. Or two. There's a million of them to choose from. Page through several and find one that appeals to you. It will teach you about basic stuff like incorporating, simple accounting and accountants, business licenses, federal tax ID numbers, lawyers and so on -- the minutiae that you need to deal with when starting and running a business.
Finally, here are several web links that you may find helpful:
Why Small Web Design Firms Should Think Big - The article could easily be retitled, "Why Small Firms Should Think Big." It is a general call-to-action for small business owners everywhere. It will help you to think big as you are thinking about starting a business.