As we become increasingly reliant on computer memory for our record storage, it is imperative that we back up the work on a routine. I recommend at least once a week doing this back-up just before going home for the weekend. That way you can have a worry free time. This back up should not be everything on the hard drive.
Programs are readily available as replacements.
Your document files are critical. Word processed documents including curriculum E-mail file with attachments, settings, nicknames etc. Your web site if you have one running. Remember you are living on the edge if you don't back up.