Drop the tune of your native tongue. English has its own tune and voice modulation. Do not drag the English words to the tune of your vernacular language. If your native tongue has a musical touch to it, lose that while speaking English. This would be the first step to neutralising.
Listen to newsreaders. Watch how their mouths move while pronouncing each word. Listening and observing are the best way to learn. Practice the mouth movements slowly. Practice this for words used in day-to-day conversation.
Use a dictionary to learn phonetics. Phonetics is the pronunciation of letters in a word. A letter has a certain pronunciation. But when it comes in a word it might have a different sound. To learn this, dictionary is the best. The phonetic symbols will help you learn the correct way to pronounce the word.
Stress is an important part of speech. Every word has a certain stress given to it either at the beginning, end or somewhere in the middle. Shifting the stress can even change the meaning. Learning the correct stress points of the words is important to communicate clearly.
For example, pro’nounce has a stress on the ‘n’ and pro’nunci’ation has stresses on ‘n’ and ‘a’. The syllable before the stress mark is pronounced for a short time.
Next thing to concentrate is diction. Diction is articulating the words. Articulation is pronouncing the words in the right manner. Clarity in diction will result in clear pronunciation of words. The pace of speech, modulation of words and sentence construction while speaking, mark diction.