A lot of students leave the exam hall having answered less than half the questions. Apart from speaking and writing exams, there is room for making educated guesses.
In the Reading section, give yourself 2-3 minutes at the end to guess answers for all the questions you haven’t found answers to. In the Listening section, you have ten minutes at the end to transfer your answers to the answer sheet. After you have transfered all your answers, fill in any blanks with logical guesses.