There are some ways for improving your English:
To speak English with your friends everyday.(Face to face,in phone,in MSN...)
To read a(more than one) book(s) which is(are) suitable for your level.(Recommending novel, story book and biography)
To write journal everyday.
To learn 5~10 vocabularies everyday.(Don't be too hard)
Every day ,go to English Plaza!!!!!(just joking)
watch more english movie or TV program.
If you can ,read more english book.(it is to hard for me to read a english book,i need a dictionary when i was reading a english book)
Try your best~~