It is a process of the brain and it takes time to develop: your mind has to attach meaning to the words, phrases and expressions represented by symbols, plus get to understand the grammar and structure of the language used in the passage to read. If you develop strong reading skills, it’ll be very helpful to your future. You can read:
1. Books in English and articles on the web. Maybe, books you have already read in your mother tongue or which have been turned into movies. Try to start with easy books, even children’s books and comics: The images will help you understand even if you don’t know all the words
2. Switch the operating system of your mobile phone, your PC or tablet into English. Associating a function with a certain word, will improve your vocabulary.