<p>TIP TO ALL STUDENTS WHO WANT TO CRASH COURSES:</p>
<p>Email the professor right away asking if you can add the course/get a permission code. If the class is really good and the professor has the ability to add a few more students, they will usually go with the students that contacted them beforehand. You can always camp in front of your computer and hope you can scout a dropped seat, but it can be really time-consuming.</p>