Two Duolingo scientists (Masato Hagiwara and Burr Settles) posted an article on TechCrunch with insights about how to learn a language successfully, based on Duolingo data.
Full article: https://techcrunch.com/2017/03/05/3-habits-of-successful-language-learners/
Snippet:
Read full article: https://techcrunch.com/2017/03/05/3-habits-of-successful-language-learners/