This is what most people would advise: read. Read anything and everything in English. You can read story books, newspapers, magazines, blogs, comics, English textbooks, instructions and ingredients on food packages, advertisements, etc. For story books, don’t force yourself to read something too difficult or something you know you won’t enjoy. Make reading fun! Read books that you ENJOY reading. I hate to read books that bore me too.
Watch English movies with subtitles. This would be my favourite way of learning English....