Several sights recommend a variety of routes to take to become bilingual, however http://m.wikihow.com states one very important tool that is necessary for becoming bilingual, is listening. The site states that improving listening skills is the key factor in language acquisition. It says that language in learned by spending as much time as possible listening to native speakers in a natural setting, and focusing on unique sounds and inflections. It delegates listening to be more important than speaking (in the beginning). Just as a baby/child acquires a language, they spend years listening first.