I don't remember how I found Leo Laporte, but I've become addicted to his podcasts and radio shows about all things Tech.   He has audio and video podcasts about Windows, Macs,  Home Audio/Video and many other topics.

One thing that he always says is that if you only have one copy of an important document or file, then you don't really have a backup.  He recommends two or more back up copies of a file. I've come to believe he is right.  I've seen more than one person who has lost their entire company's records when their computer crashed.  I've even lost all the pictures that I had of my son when he was a baby when I reformatted my hard drive.