So you think you want to work on Wall Street. The idea of working in the financial markets excites you'and so does the idea of making a big salary. Before you interview, though, you should take some time to consider your career choice more carefully. Do you really want to work 80 hours a week? If you do, in which firms would you best fit? And what kind of banking do you really want to do? Be sure to read this Insider Guide to learn the answers to...