Improve my English

I have a meeting with Jessy, my teacher. I didn't have a good grade on my mid-term exam. Teacher asked us that what difficult we have on study. After the meeting, I think the problems seriously. How to improve my English abilities? Maybe I just can read lots of news or magazines to improve it. Furthermore, I can try to talk with foreign people to practice my oral skills. I can listen the radio to train my listening. I can write the dairy in English everyday.
Perhaps I still don't have good skills on writing, I just try it.