Earlier this summer, my old laptop crashed, taking everything in it...pictures of my kids, manuscripts, everything. I had a few things saved on disks, but not everything. You'd think I'd learn.
But no. I got too comfortable with my new refurbished laptop and saved things on disk when I remembered, but since it was in great condition, I figured there was nothing to worry about. I neglected to factor in emergencies like viruses and worms. Oh yeah. Thankfully, I was able to retrieve most of my work. I need to look on this bright side otherwise I'm gonna cry over a couple of revisions...
To make a long story short, save your files on a regular basis to a place other than your hard drive. There are on-line storage files. You can burn things into a CD. Ask around to find out what other people recommend. Just save everything.
The moral of this story: If you anticipate complications ahead of time, you can use preventive measures to fight off problems that will postpone your progress. Now I'll go find my Magic 8 ball and hang my head in shame.