For the love of Celestia, BACK UP YOUR FILES · 3:29am Feb 24th, 2015
Last night, I almost lost a non-MLP novel I've been working on due to the file being corrupted; the only reason I didn't was because, by sheer luck/providence/whatever, I made a backup copy back in early January. Still, knowing how close I came to losing it scared me half to death. Without that backup, almost two years of work would have been lost forever.