Remember to lock & log out
Unless your computer is in a secure, private space accessible only by you, you should enable a screen saver that will automatically lock the screen after 15 minutes of inactivity, equiring a password/passphrase to unlock it. This is necessary, because an unauthorized person could see sensitive information, manipulate your email or social networking sites open, or exploit the access to your computer in other ways.
Make a habit of locking your computer every time you leave it, so when you are ready to use it again it asks you for your password to log in. This will prevent someone from sneaking on to your computer and stealing files.
Remember — making copies of most digital files are fast and easy, usually leaving no indication that the file was ever touched — meaning somone could walk up to your computer, make surreptitious copies of your files, and leave without you ever knowing.
Remember to log out as well
For your own protection, always fully log out of all of your computer accounts before leaving any workstation — this includes not only Oncourse and OneStart, but also from the actual workstation as well (Windows or Mac OS X).