Comment All Way Sync (Score 1) 251
I use All-Way sync. Every machine I build has 2 hard drives in it, not in a RAID. The second drive is only used for backup. The sync app moves data from my important directories every night to the second drive, and every once in a while when I feel like it's needed they also sync across to another machines backup drive in the house. I also keep a drive at a friends house for my really important data and every once in a while copy to that too. It's fairly simple, it works well, and I haven't lost important data in years.