Help is available to the student outside of the scheduled class meetings in the help room in Krieger 213 beginning in the second week of classes and continuing up until the first day of finals. The Krieger 213 facility should be regarded as the first place to turn to for help with mathematics courses outside of class. Mathematics TAs hold pooled office hours in this room during the day from Monday through Friday. In addition, advanced undergraduate math students hold hours several evenings each week. Check the door of Krieger 213 (or follow this link) for a current schedule.
In addition to Pólya's book mentioned above, there is also a booklet How to Study Calculus2 which may be required for your mathematics class; it is available at the bookstore and is also on reserve at the library and at the Department of Mathematics.
There is another place for you to get help with your math courses: try the newsgroup jhu.math.help. This newsgroup is intended to be a forum for students to ask (and give) help on Calculus, Linear Algebra and Differential Equations material. If you need help, you can ask a question at any time and read replies at your leisure. If you're a math genius and want to help other students who post questions, here's a place to show off your knowledge. But be careful that your answers are correct -- other interested people, including TAs and faculty, will be reading this newsgroup as well.
Tutoring is also available through the Office of Academic Advising. Because of the high demand for tutors, restrictions have been placed on who may receive tutoring. Students who have not met the guidelines for tutoring set by the Office of Academic Advising may still be eligible for tutoring in their mathematics courses if they have shown signs that they are in danger of failing. Students in this situation should consult their TA to discuss ways of improving their performance. Students should try changing their study methods and availing themselves of other help resources before applying for a tutor.