I lost half a night's work just now because after about 6 months of learning and working with Mathematica it finally decided to crash on me for the very first time. Yeah my bad. At least I can remember what I did. Still I am now determined to find some way to not let this happen again. I couldn't find a setting for it in Preferences but I suspect there may be system options I can place at the top of a notebook. Please help.
NotebookAutoSave
in the documentation. reference.wolfram.com/language/ref/NotebookAutoSave.html $\endgroup$