em ,i think practice make perfect,if your time is permitted ,go ahead to some English corner to practice ,or speak to yourself. for me ,it is a good method to improve the oral English ,hehe, sometimes i often use this method , i think the effect is not bad ,how about have a try ? moreover ,come to HXen's forum "hot topic" this part,and then participate in the arguing of topics.
way to go ,i believe you will improve your oral English very soon.