Thanks for your sharing. I agree with you that reading leisure book is actually a fantastic opportunity to learn day-to-day English. As a matter of fact, I learnt a resonably amount of English from movies.
Another thing I'd like to share if you are studying abroad, try talking more to native speakers. It is very natural that Chinese stay together because of similar background. Yet, beware that you have no time to speak in English! Sometimes it takes effort at first to get along with people; that is because they would be hard to understand your accent at first. However, if you have an attitude to learn and have a cheerful character, people will like you! Telling jokes is one of the key to friendships in North America.