you must speak with other people. there's a lot of opportunities to do that here, language exchange or tutoring. without conversation you might learn the language enough to understand everything that's written but you'll find it very difficult to speak...

be in the foreign countries  ı think it is the best

 Nursery Rhymes,   children's  stories,   songs,   and reading over these with a native english speaker for a language partner. 

All my life I didn't have opportunities to be in other country than my ;)  At the moment I have Italki account and since week I speak with some peoples. Besides I likes sing a songs so it's my personal activity and way to learn English language. Also in this way I practise my pronunciation. It will be a long way before me but it is worth ;)

There is no best way for everybody. Try to find some activity you most enjoy. Could be songs, could be speaking, could be software