try to listen to more english songs because it's helpful for you to learn new words or prounance through the songs you like.
watch some good movies(in english)and try not to put the subtitle on because you can test how good your english are through the dialog.
read some english novels that you're intersted ,it can improve your english as well.
try to speak more english with foreigners when you have chance because speaking is really important.
you can recite some useful expressions if you want because it's very useful in daily life.
try to send emails with your foreign friends,because it's a good chance to pracise your writing english.
remember not only to write well in english but also to speak english because english is a LANGUEAGE!
and try to make your prounanciation well,because bad prounanciation could make people get the wrong meaning of your sentece or words.