English-test.net: There are few web sites as big or as content rich.
In the TOEFL preparation part of the web site, you will find ample practice with vocabulary. If you diligently study at the web site, you can learn learn many adjective and verb forms of the words you are studying. To reinforce your knowledge of the words you are studying, you can play voabulary games. There are even some great tips on how to improve your vocabulary.
In addition, the web site offers a TOEFL forum in which you can post responses to writing practice test questions, and you can get comments from other students preparing for the TOEFL exam.
Therefore, if you have not been to English-test.net and if you want to find others who are just as serious about getting a high score on the TOEFL as you are, then maybe it is time to visit this site: http://www.english-test.net/toefl/