There are many options for somebody who majors in business. You can do sales, marketing, finance, accounting, management, insurance. The list is endless. You don't need to decide right away either. If you are unsure about what you really want to do, a degree in business is very versatile and can lead to to many different, rewarding careers. If you like math, then accounting or finance might be a good fit. If you like to talk to people and enjoy the idea of selling a product or service, then marketing or a general business major are good fits.
Some great options in our current economy are insurance (it's necessary) and IT. Technology will always be around and it is constantly changing. It is a good idea to choose an industry that is necessary to ensure job stability during recessions.
I hope this helps!