First of all ...you have to go step by steps For learning english ..the steps are as follows 1.Basic Grammar 2.Understanding English 3.Reading for getting experience 4.Speaking fluently 5.Listening english like songs movies etc 5.Pronunciation and flow of speaking 6.Professional Writting skills Etc. If you have done all the earlier steps then only focus on pronunciation otherwise you will spend more time and learn very less...so for efficient learning you need to come step by step For improving pronunciation you need to focus on listening first ..Listen english songs,watch English movies and watch english new channel daily .. Then you need to read daily 3 or 4 pages of english novels loudly and try to pronounce correctly with feelings accociated with the sentences...do not read those pages for purpose of understanding and read them for the purpose of pronunciation, .All the best..