Reader Jamie offers a quick security tip. If you're the type that's frequently away from your desk, you may want to keep your machine secure while you're gone. As Jamie points out, you can simply turn on your screensaver and set it up to require a password at de-activation. Next, activate a screensaver hot corner and you're all set.
Of course, a determined person can simply restart your machine. But knowing most of the people in my office, this simple trick would stop them in their tracks.