If you're into audio methods, libro.fm is having a sale on several complete language courses of the Paul Noble method: French, Chinese, Spanish, Japanese, German and Italian
As usual one single method won't make you fluent but I personnally like the laid-back no-stress feel of those methods (and the sale is consequent 80+% off): here
They also have "fluent in 3 months" and books about writing in English or about the English language right now: all the language sales
(Also not sponsored or whatever but libro.fm is a no DRM alternative to Audible and you actually own your audiobooks and can have them in mp3)











