Rachel's English has a lot of free videos with focus on phonetics: http://www.rachelsenglish.com http://www.rachelsenglish.com I like this course (I bought th

Rachel's English has a lot of free videos with focus on phonetics: http://www.rachelsenglish.com http://www.rachelsenglish.com I like this course (I bought the pdf+mp3 version): http://tarlespeech.com/accent-services/accent-products/standard-american-consonant-sounds/ http://tarlespeech.com/accent-services/accent-products/stand... http://tarlespeech.com/accent-services/accent-products/standard-american-vowel-sounds/ http://tarlespeech.com/accent-services/accent-products/stand... She also has some very helpful free videos: http://tarlespeech.com/accent-services/minute-of-speech/ http://tarlespeech.com/accent-services/minute-of-speech/ It's very important to record and listen to yourself. It'll become clear very quickly what you need to improve.