Allot two to three hours each day to practice how to pronounce words properly, pace your speech, and practice articulation. Take down notes of words and sentences that you find difficult or tricky to pronounce. One modern approach is to use technology. There are apps that can run on smartphones and tablets that listen to what you say and then give you feedback. For example, on Android there is the free app "Talking English." You can also find similar apps in the Apple App Store. . Choose some speeches, short stories, or poems from a college English textbook (or any other text you like), and read them aloud. That way, you can concentrate on the sounds and muscle movements involved in each word and not have to worry about coming up with the words yourself. Use a hand-held voice recorder, or speak through a microphone connected to a stereo set or boom box. Doing so allows you the chance to review your sessions and track your progress. Practicing correct pronunciation, enunciation and diction may sound like a lot of hard work, but all the dedication does pay off. You will feel so proud once you have made significant improvement and you listen back on one of your very first sessions. . Speaking slowly may be frowned upon by some people, but slow and careful speaking is a very effective way to express yourself when you have a speech disorder. You don't have to speak very slowly; merely speak in a pace that's comfortable for you and your listeners. A steady pace is better than speaking in a fast pace, especially if you want to send the intended meaning of your message across.

TL;DR in Indonesian:
Carilah buku atau rekaman pembicaraan/pidato untuk latihan.  Bacalah Rekamlah sesi latihan Anda. Jangan terburu-buru.