The only irreplaceable data I have is photos/videos of the family. It's getting to be about 10 GB - I've got two hard drives in my PC that I'm planning to mirror the data across. At the very least it'll save me from hard drive failure. Theft/acts of god are something I haven't planned for. I have thought about burning a bunch of DVDs (of just the photos) and storing them somewhere else (work/relatives/bank).
I use dropbox to sync passwords and some docs from work/home. I'd like to use dropbox (or something like carbonite) to back up the rest, but frankly I'm too cheap/lazy to go through with it.
10 GB is also small and cheap enough to buy a USB drive for and back it up on. It's what, $10 for a 16 gig thumbdrive or so? Afaik, they also have less concern about bit-rot than DVDs or CDs, not to mention the ease of use.
I use dropbox to sync passwords and some docs from work/home. I'd like to use dropbox (or something like carbonite) to back up the rest, but frankly I'm too cheap/lazy to go through with it.