To protect your data, back it up on a REGULAR basis. If your data is damaged for any reason (hardware failure, power outages, voltage spikes, human error, etc.) many times the only way to recover is to restore your backup.
LYNXPM, L.L.C. highly recommends a tape drive or similar backup device be installed on standalone computers or on your network server. Backups need to be done everynight.
WE RE-EMPHASIZE - BACKUP ON A REGULAR BASIS!