Tech Crunch – Burr Settles and Masato Hagiwara 
Roughly 1.2 billion people worldwide are currently learning a foreign language. If you are one of them, this article is for you. Whether you are learning to improve your job prospects, do better in school, get ready for a trip abroad or even just for fun, there are three common habits that all successful language learners share. We analyzed data from millions of Duolingo users and, in the process, discovered what it really takes to grasp a foreign tongue.(more)