OVERALL TEST TACTICS:

Learn the section directions now. Use the time saved during the test to work on questions.
Successful answers to the earliest questions in computer adaptive versions of the test
will lead to higher scores.
Do not write on any test booklet or materials.
Use the process of elimination to decide which answers are wrong.
In the computer adaptive section, Double check your work and answer before you click on the screen bubble. You cannot skip any question and you cannot go back after you've answered a question.
Answer every question, making educated guesses if you have to. Just try to eliminate one or more choices before guessing.
Don't spend too much time on any one question. You should spend only seconds on the easiest questions, and hesitate to spend more than 1/2 minute on even the hardest ones.
Practice, practice, practice!
Bring a watch to the test center. You can't be guaranteed that there'll be a working clock there.
Bring a couple of IDs to the test center. Make sure at least one of the pictures actually looks like you. Also bring any authorization voucher you may have received from the Educational Testing Service.

adapted from: http://www.testinfo.net/toefl/toefl-tips.htm