Learn to recognize all the English sounds and learn their IPA symbols. Recognition is important because it lets you learn the pronunciations of words from spoken English. Suppose you’re listening to a podcast and you hear the word dock. In order to remember the pronunciation correctly, you need to realize that you just heard /dɒk/ and not /dʌk/. You can’t do this if you can’t tell the difference between /ɒ/ and /ʌ/. You can’t learn English pronunciation if you can’t tell the difference between English sounds, just like you can’t learn spelling if you can’t tell the difference between letters.

Get in the habit of checking the pronunciation of English words in a dictionary.

When you’re speaking and you’re not 100% sure how to pronounce something, don’t guess — if possible, check the correct pronunciation before you say it. If not, then at least check it soon afterwards.

While you’re reading in English, keep asking yourself: “Do I know how this word is pronounced? Can I transcribe it with phonetic symbols?”. If you’re not sure, look it up in a dictionary. This should happen very frequently when you’re a pronunciation beginner.

You have to be a little obsessive, especially in the beginning. Remember that English pronunciation is unpredictable. Don’t think you just have to check the “difficult” words like determine or process. Common English words can have very surprising pronunciations.

Listen and notice. Get some spoken input: TV, podcasts, movies, audiobooks, recordings in dictionaries, etc. When listening, pay attention to how sounds and words are pronounced. Think about what sounds you hear.

Practice pronouncing English words from time to time. Practice can take many forms. You can practice in a systematic way (e.g. a 15-minute session with a dictionary or online pronunciation exercises), or you can just repeat a couple words while you’re doing something else (e.g. watching a movie or taking a shower). The important thing is to do it regularly — that way, you will make steady progress.