http://www.bettertoeflscores.com Michael Buckhoff, author, founder, and materials writer for "The 7 Step System to Pass the TOEFL iBT," explains to his online TOEFL students how to use the listening section of the course to help them improve their TOEFL scores.
You can also become one of Michael's students, so click on the above link to begin your seven step TOEFL iBT online preparation.