....more of a common sense thing.
SAVE YOUR WORK REGULARLY.
I have a guy in my office who works on a really old computer, I think we got it from moses. His computer regularly crashes and he never saves his work, he will go hours without saving, so when it crashes he loses hours worth of work, unless i can salvage his autosave.
I tend to save every 2 minutes as I work through a drawing, less hastle if anything goes wrong.