1) Be sure to back up & remove any personal files on your work computer-- you really only should be having work related files on your workplace computer anyway!
2) Back up ALL files on any devices that you may have used to "log into" your workplace server such as your personal computer, your phone or your iPad since these devices may "reset" themselves back to factory settings once you have left your company due to a remote wipe feature that they may have as a security measure!!