To ensure you understand what the question is asking you to do:

Read the question carefully two or three times

Analyse each question, focusing on identifying and highlighting any keywords (Tip: the study skills advice sheet “What does the question mean?” contains a list of common key words and their suggested meanings)

Allocate your time according to the time available and in proportion to the marks awarded to each question. For example: If you have an exam where you have to answer 4 questions in 2 hours but where one question is awarded 50% of the total marks make sure you allocate 1 hour to answering that question and leave yourself 1 hour for answering the remaining 3 questions.
Because time is so precious, it is tempting to ignore the importance of planning your answers, however, remember that a few minutes spent planning your answer is time well spent:

Remember you can choose to answer the questions in any order that you wish, so start with the easiest question first. This will boost your confidence and get your thoughts flowing

Brainstorm the question  what do you know that's relevant?

Make a note of your ideas at an early stage to help you remember your key points

Make a plan of your answer using the method that you have practised in your revision, put your points/information into an order that is logical and coherent, make sure you include an introduction and conclusion

Write your answer, adhering strictly to the time you have allocated

Leave a few minutes at the end of each question to check your work through for any obvious errors