If you work in a busy area, it's a very good idea to lock your computer when you are away from it. At my office, if you don't lock your computer, people have a habit of sending embarrassing emails from your workstation. While I always try to lock my terminal, it can be hard to remember every time, especially if something "just comes up".

There's a new program out there called Blue Lock that will automatically lock your terminal when you are away so even if you forget, you are safe. It works using your blue tooth phone. As soon as it detects that your phone is out of range, it locks you terminal. If you use a blue tooth cell phone (or other device) and you keep it on your person, this app works very well. If you leave your phone lying around (always a bad idea), it won't work nearly so.