The TOEFL is a test of English proficiency accepted by over 5,000 universities in 130 countries. It consists of 4 sections - Reading, Listening, Speaking, and Writing - tested over 4-5 hours. Scores are out of 120 total points. The test costs $185 to take and results are valid for 2 years. Proper preparation includes sleep, nutrition, and avoiding overstudying the day before.