Learning multiple languages at once?

Language Geek posted an article back in March about learning multiple languages at once. Josh, the author, is learning German, Russian and French (as well as Dutch and Spanish) and raises the question of what is the best way to learn multiple languages gleichzeitig.

This is an interesting question. I have been learning German as my number one second language, but also beginners Spanish. I've also been thinking about starting to pick up Dutch and or French. I'm taking advanced German on a postgrad course at the University of Auckland so the question is one I can relate to.

He suggests:

I'd still like to study all four, but I've not quite figured out the best way to do it yet. I mentioned staggering the languages in my previous post, but I doubt I'd stick to a strict schedule (Spanish on Mondays, German Tuesdays, whatever).

This would seem to work. I suggest using different materials for different languages as well though. So for example, German on the PC with byki or anki or whatever you like, Dutch with a grammar/vocab self-study book, Spanish with a conversation buddy followed by watching a DVD? Then after a month or so switch around.

On a seperate note, I managed to pick up es espanol 1 nivelinicial at 90% off today at the University Bookshop in Auckland. That was NZ$6 (about USD4!). I was very happy, especially that it includes a CD. I'll have to see how it goes - maybe there's a very good reason it's so discounted.

Cheers guys, Nic