Learning any skill Tim Ferriss

The most important lesson of language learning: what you study is more important than how you study.
Students are subordinate to materials, much like novice cooks are subordinate to recipes. If you select the wrong material, the wrong textbook, the wrong group of words, it doesn’t matter how much (or how well) you study. It doesn’t matter how good your teacher is. One must find the highest-frequency material.
Material beats method.
Fortunately, as long as you hit the highest-frequency material, I learned that content matters very little.
My panacea, it turned out, was judo textbooks.
Though the vocabulary (think, ingredients) was highly specialized, I eclipsed the grammatical ability of four- and five-year students of Japanese after two months of studying judo. Why? Because the grammar (think, cooking methods) was universal.
The principles transferred to everything.

Is the method effective? Have you narrowed down your material to the highest frequency?

Is the method sustainable? Have you chosen a schedule and subject matter that you can stick with (or at least put up with) until reaching fluency? Will you actually swallow the pill you’ve prescribed yourself?



Selection- do as little as needed, not as much as possible, the fewest changes that get us our desired result 


ONE MUST FIND THE HIGHEST FREQUENCY MATERIAL



https://blog.todoist.com/2015/08/11/how-to-learn-anything-a-real-world-guide-to-mastering-any-new-skill/