Way to learn foreign languages

Any advice on learning an additional language is kind of like dieting advice. It has probably worked for a few people at some point. But it generally involved unrealistic expectations about behavior and resources. This particular advice is more than a little kooky because it completely ignores communication but it would certainly take you some of the way towards learning the language. But memorizing 1,000 words is not trivial. Also, completely unfiltered radio or TV is probably not very useful without at least some initial guidance.

If you really want to devote that much time and effort to learning a language, Benny, the Irish polyglot offers more comprehensive advice in the same vein on his website here: http://www.fluentin3months.com.

Language learning is hard and it takes a lot of time. So whichever way you slice it, you will have to put in the hours. The internet is certainly a helpful resource for that.

As to the point about adults modelling their learning after that of children, that is completely unrealistic. Children have different motivations, life experiences and generally not as fully developed cognitive strategies as adults. Giving up on those (such as by ignoring any grammar at all) is foolish. However, the biggest obstacle will be inhibitions and trying to maintain your linguistic identity. So that's certainly a lesson, you can learn from children. Simple immersion without marshaling at least some of your adult cognitive advantages would be unwise. There is also a lot of individual variation in how well different adults learn without some sort of guidance.

Perhaps an even better resource is therefore Rebecca Oxford's learning strategy inventory.