Backup your data!! Listen to someone who knows..

Backup your Data!! This goes not only to system administrators, but to the average guy who sits at their PC everyday. I sadly see many people lose data every day and it is always 100% avoidable. Yes, I said 100%!!! A good backup solution starts with proper planning.  I recommend taking at least two backups. This gives you redundant backups and more options in the even of a disaster. Take this server that this very site is hosted on for example, I am running with a clustered NAS backup provided by my hosting company, and do offsite backups as well leaving me with redundant backups. I do not leave a persistent mount to backups so that if my server gets compromised, by backups are still safe. My offsite backups reside on my office server that I have access too at all times.  Backup your stuff and ultimately you can rest easier at night.