Get a transcript of a radio show on line. Listen and read, reproduce. These things working together will help the information stick better. Get a teacher.

I think the easiest is to do what the native people do when they first start to learn English - with rhymes, memory aids and stuff like that. And regularly thinking in English or reading to yourself helps too. Of course, the most effective way to learn spoken English is to speak it: be it in front of a mirror, to your pet, to other people, as long as you get the sounds pronounced, you're practising :)

Speak with people who speak English. Watch English shows and repeat what they say in the way they say it (if you know what they are saying). Listen to English music and sing along.

I have few foreign friend and I can't practice all the time.

Thanks for your suggestions. I would try to do it. And I offen listen English song but never sing along. haha. This is a good attempt.