After reading through your notes, when you think you know the material, start to test yourself. Make up questions on the material and see if you can answer these questions without looking back at your notes. Always check your notes after answering your questions to see if your answers are correct. Write your own multiple choice, matching and true false questions. Then, make sure you can answer these questions.
Some students find flash cards a good way to study.
You can write terms or questions on one side of the card, and the answer on the other side of the card. As you flip through the cards, you can answer the questions or define the terms and then check the answer on the back. Some students find studying out loud more beneficial than studying silently. Some students find studying in groups better than studying alone. You need to determine what works best for you.