My computer is finally all backed up. Very, very, very important. Should have been done long ago.
I used Dropbox. You keep all your files in a Dropbox folder, and they will automatically be updated to the internet whenever saved (and to your other computers if you have them).
It's the ideal system for me, as anything that involved me actually doing anything would not happen.
The only downside is that you can't have it uploading while you're working, as it slows the computer way down. Leaving the computer on all night for a month was the only way to back up everything. But that was over 80MB, so fair enough.
Edit: that was meant to say 80GB of course!