In this video I talk about a concept that Chris Lonsdale gets wrong in his TEDx Talk "How to learn any language in six months": Immersion (watch his video from minute 6:25 on). Much of what he says before and after that is true, however, and I highly recommend to watch his talk:
/watch/sklaTxDET=lennahc_ba&s383=t&0ndWENdGy0dGa