Backups

I wrote a couple of years ago about my backup plan, but it's time to revisit it in light of new information.

While I was at the conference, I brought my MacBook to the local Apple Store to get a minor problem fixed*. My AppleCare extended warranty will expire while I'm in Ukenzagapia, so I wanted to be sure to get it taken care of before I left. They had to replace my whole display, which I figured would be the case. What I didn't expect was that they said it's a 4-5 hour task so I needed to leave my computer for up to 3 days! Still, I was ok with this because I had brought my external hard drive anticipating this separation from my computer. I use Time Machine to back up to 2 different external hard drives. I thought I'd be able to boot from my TM backup onto my friend's MacBook, but no. Time Machine backups are serial locked to the original computer. The only way to get your data off a Time Machine backup (according to the guy at the store) is a full restore onto a different machine (erasing whatever might have been on there).

So, I need a new backup plan. I will keep doing Time Machine backups, but I think I need to do something else too that would allow me to access important files via another computer. What do you do? Should I partition my back up drive and keep part of it for TM backups, and part of it for "manual" backup copies of the stuff I'd need to access from another computer in case mine fails?

Online backup options are out of the question right now because I can't do them in Ukenzagpia. I have some (mostly shared) files in Dropbox but I only have 2 gb. In Ukenzagapia I plan to back up to a third external hard drive.

*The Apple logo on my display became unglued. While this is mostly cosmetic, it does let dust in behind the screen, and I think it increases the risk of my screen getting damaged from behind. I really didn't want to end up with a shattered screen in Ukenzagapia!