[quote name='Mojimbo']What exactly do you need to backup, darthbudge? Your OS should be on a separate partition from all your important files anyways so you can nuke it freely whenever it shits its pants.[/quote]
Um... Steam games and save game files mostly.
I have some other stuff I needed to backup also, but it is nothing major. Mostly the hassle is just going through everything, making sure I don't miss anything I really want.