How do you improve your English pronunciation? You practise and practise.
How do I practise? When Tom and I started working on our Russian and Chinese pronunciation, we discovered that reading tongue twisters and poems as fast as you can is the best way to train your muscles and ears to sounds of other languages.
To download all our tongue twisters and poems (audio, video and pdf), subscribe to our channel (clockworkenglish.pivotshare.com/subscribe).