In addition to purchasing your laptop you might be interested in purchasing some additional accessories. This list includes things that may or may not be of use to you in class.
Thumbdrive
This replaces the old floppy disk. It holds a lot more information
than a standard floppy and plugs directly into a USB port. These are typically
cross platform compatible.
Protective Case
Your laptop is fragile and a protective case will help ensure
that minimal damage is done to it while you transport it from home to class and
back.
Printer
Having your own printer can save you time if you need to print out an
important document. Rather than go to a public lab and use the shared printer,
you can print your document and go.