Practice pronouncing words correctly. For example, if you are watching a movie, or the news, in English you can press pause, and say out loud what the character in the movie has just said. Press rewind and see if what you said sounds the same as the actor in the movie. Repeat these steps until you can say a word or phrase perfectly; also be careful to find out the exact meaning of what they are saying. Other than that, the best way to learn any foreign language is to talk with a native speaker. Hopefully in your country there are people from Canada, Australia, England, or the United States. Make friends with them, and try your best to speak English with them. Also, and most important of all, don't be afraid to make mistakes. Your mistakes will help you to perfect your English. Without trying, we can never succeed.