Unrelated to topic, but for Mandarin you should check out chineseclass101.com. They have some cliched advertising, but they have a lot of audio lessons that range from zero to quite advanced, and the lessons themselves are much more entertaining and "real-world" than Pimsleur's imo.

Also, flashcards using Anki to memorize vocab and characters are effective, but not something you should be doing while driving!