Last night I mentioend backing up things, and I need to reiterate that point. BACK IT ALL UP.
Fedora introduced me to a small backup utility called Deja Dup. As far as I can tell, it takes a lot of inspiration from Time Machine in OS X (which was, admittedly, a great idea to begin with), but has a few extra features including off-site backup.
Give it a go and see if that's your kind of back-up tool.