Just speak !!!! First day I guarantee you'll be lousy and second day too... =p but the third day you will notice some improvement and so on... at day 500 you'll be great O.o just joking ! Keep talking until someone send you to shut up and then, just keep talking... I think this is the only way... besides of course, know some vocabulary (by reading ) and paying attention to pronunciation in everything you hear... =) (http://www.italki.com/answers/question/69633.htm)

read news papers loudly and try to speak in english allways and conventrate ur mind when u are learning oral english .