After my friend had his hard drive crash, and he lost a lot of important data, I realized I've been protecting myself from something like this without even noticing. If my computer crashed right now and I lost everything on my hard drive, I wouldn't lose anything important. Not because I'm paranoid and have a tape-system backup in my basement, but because I take advantage of free & portable web technologies that simplify my life. If you don't use them now, check them out. Who knows, you might find something useful.