Good tips and a solid foundation for both children and adults.

Your inclusion of audiobooks is particularly astute. Many ESL professionals and English language learners overlook this powerful learning tool. I strongly recommend that my adult and university students listen to their favorite books - in English. Jack London, Heminway, and Steinbeck seem to be very popular choices. This can become a very practical habit - especially if you listen in your car while commuting to work.

For the younger generation, I also suggest podcasts and YouTube. The BBC, Voice of America, and National Public Radio all provide excellent materials for the curious and ambitious.