You know the first day of class when the professor explains the marking scheme and announces office hours? Believe it or not, those office hours are like gold! You get almost unrestricted access to an expert in a particular field. To get the kind of tutoring, advice and tips you can get from a professor during office hours, companies and individuals are willing to pay hundreds or thousands of dollars. The professors know what will be on the your exams and they know where you are likely to have problems, so use a professor’s office hours to your best advantage.