hillo how are you. my dear your question is very important and the answer is very simple. you have to read read and read . then you will improve yourself by indirect way.Also, you will get more vocabularies.

Personally I think it is not that hard to pass TOEFL for someone whose English is decent. But you still need to do a lot of practices. There are also other test skills you need to learn. For example, we might need to learn how to grasp the key word from a length paragraph. Here are some sample questions that you might need. Take a look. http://www.stu88.com/hotexma/tofel/6065.htm

Standardized tests are great because you are able to research the format and prepare for each section. Here are a few websites that may help you. If you can find a tutor, that would be good too, but don't pay anyone if you have the determination to work on your own. There are many books and sites that allow you to get practice on your own. Take time and complete a practice test so you can see what areas you need to focus on while you study for the exam. Standardized tests are also about deduction, reasoning and test-taking skills. Many native speakers of English use these skills for tests as well (SAT, GMAT, LSAT, etc.) You can't learn everything, but you can learn how to recognize incorrect answers. This is key to improving your score. Good luck! http://www.google.com/search?hl=en&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=TOEFL&spell=1 http://toeflpractice.ets.org/ http://esl.about.com/library/quiz/bl_toefl1.htm http://www.examenglish.com/