Check this outhttp://www.englishpassio.com/2015/06/12-simple-tips-for-improving-your.html?m=1

Do as many things as possible in english. For example subscribe to youtube channels from native speakers. In your free time listen to podcasts in english, ebooks etc. It will be much better if it's something that you are interested in (for me everything connected to video games industry).  Watch some funny stand up comedians in english. Change menus in your tv, game console, mobile phone to english. Use google and search for all things in internet in english. This became for me my second nature and now I do it naturally.   

I learn it by funny way to be interested when I'm studing, so this will help you 

(abaenglish.com) 

I am a self-taught

Watching movies is the best way !

Reading books in original without dictionaries :)