Well, I was initially looking to backup /home/user/* as several apps keep settings and files there. Once I got that, I threw in /opt/* for fun. MyDocs can be copied via usb, so I wasn't as worried about that.

I never planned on doing a "full restore" (un-tar back to /opt or /home/user), I was using it more to pick and choose a couple/several files to restore. Given the size (max 2GB) I figured it was easier to do the whole thing, as opposed to guessing what I'd mess up next.

For a while I was doing quite a bit of modding, and occasionally screwed something up. At least a couple times, I was able to go through the backup, pull out a file(s) and replace a corrupted/missing file(s) via ssh.

*I would not recommend doing a full restore, unless you know what you are doing as it may destroy your N900*