Read the textbooks your future employer provides you. Familiarize yourself with the information without taking notes or highlighting. This could take you a month or so, depending on how much time you devote to reading.
Study the textbooks again, taking notes and highlighting information to ensure that you understand the basics of all topics. Complete any end-of-chapter questions in the books. This could take another month to complete.
Purchase an online training course from a vendor such as Training Consultants. The questions on the Training Consultants' practice exams are similar to the questions on the actual exam. This allows you to go through the process of test-taking while timing yourself for the six-hour exam.
Take free practice exams online at a website such as Investopedia or TesTeachers Online. Both offer practices questions for the Series 7. Investopedia requires free registration before you can take its quiz.