Best way is reading novels of foreign authors, starting from simpler ones.
You should also see any forgn book on grammer. Teach yourself Parts of Speech one by one, then Tenses. And simple things like that. A good teacher will help you to get a start and push.
Then write on your favourite simple topics. Its good to keep a daily diary. This way you will easily get power of expression plus to examine yourself.
Believe me, these things matter alot. They can easily get yourself upto the mark!
Prayers,
Hideous Ahsen