I want to backup all my documents, not just MS Office ones, and it is no more difficult to do that than just the Office ones.
I have recently bought Second Copy after a trial. It cost about £23 only and I am very please with it. (It was recommended by two people on sevenforums. It is exceptionally easy to set up, entering info such as what disc etc. in simple dialogue boxes labelled "What", "Where", "How". It can be set up to carry out the backup(s) periodically or manually. I have two external, desktop, USB hard drives, one as a first backup and the other as a second backup. As I don't want these running continuously when the computer is on, I switch them on, select all the backups, and manually tell Second Copy to do the backups while I go on to other tasks etc. Its works a treat. Here is a clip of the my backups:
EDIT: Having seen the post immediately above, I would never rely on an external system for backups. As the poster says, the second party could go bankrupt, die, or just quit. Keep it in-house, I say. I also have set up Windows' Backup and Restore procedure to backup the C: drive at 4 pm every day, and create a restore point now and again, for example just before installing something. Its all very easy after things are set up.