Reading through all the comments I think I must be the only one who uses Archive Manager to backup. I backup everything on my home partition to a USB flash drive (memory stick). Things I leave out are iso files and other compressed archives that maybe sitting in my home partition.
I tend to only backup though when I remember, but then I don't have a lot of personal files on computer anyway.
I'll have to look in to rsync though, sounds like a better app for backing up.
On second thoughts just looked at help screen for rsync and looks too complicated to setup.