Summarize this article:

Concentrate on the left-hand column and summary at the bottom. These contain the most important points you will need for your assignment or exam. You can underline or highlight the most important parts as you review, if you prefer. Cover the right side of the page (the note-taking column) with your hand or another sheet of paper. Quiz yourself by giving answers to the potential questions that you included in the left column. Then uncover the right side and check your comprehension. You can also ask a friend to quiz you on your notes using the left column, and you can do the same for them. Reviewing frequently over a longer period of time, rather than cramming before a test, will greatly increase your retention and deepen your understanding of course material. With your effective notes made using the Cornell system, you will be able to study efficiently and with minimal stress.

Summary:
Read your notes. Use your notes to test your knowledge. Review your notes as often as possible.