Dropbox allows you to sync your files across computers and even your mobile devices (Blackberry, iPhone, Android phones are all supported). That way, when you save a document on your computer at home, it will also be accessible on any other computer on which you install Dropbox–so you will never again have to tell your professor that your file is on the wrong flash drive, or that it didn’t e-mail properly, or any other reason for not having your paper ready to turn in.
It also allows you to share files with other users, which is useful for editing and group projects. But perhaps its most nifty feature is that it saves previous versions of your files for 30 days on its servers, so you can go back and retrieve files you accidentally deleted or edited by mistake. Very handy.
As far as I know, students are allowed to use Dropbox on campus computers; check with IT if you have questions.
Go here to check it out and sign up.
I have encouraged many of you to put your documents on Google Docs, which serves much the same purpose, but Dropbox is more like the interface you already use to save files. I hope that encourages you to use it–or some syncing method–regularly.