A teacher of English I know is reading an unabridged novel in that language, namely a thriller.
He reads few pages every day more or less, and after reading and enjoying, he goes back to focus on specific words he didn’t know, at random; also on phrases, not only words. He tries to learn those words.
With his high level of English and subsequent sense of the language afterwards he can use by writing words he sometime learned. / Photo from: o-TEEN-READING-NOVEL-facebook www huffingtonpost com