Echoing b212's comments. You need to learn how YOU learn best. Rosetta stone was OK, but I like the Barron's volumes used by the State department. When you want to learn several languages it's VERY important to decide firmly on one and learn it. I spend ten years vacilating between really learning Spanish (since I "learned" it in high school), Japanase (since I "learned" it living in Japan), Chinese (since it's like Japanese - written, and I think it will be important in the future), Greek and Latin (as the foundation for the West.)
I would start one for a few weeks, then another ad infinitum....
Finally, I settled on getting fluent in Japanese first, since I already partially fluent.
Pick one and go!
Stephen
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