Strategies for Active Reading
"Annotation is a strategy for active reading wherein you write the key information (such as major points, definitions, and examples) in the margins of your text. You are looking for and marking all the information you will need to remember from each chapter. Because it gives you a purpose, you'll find that annotation helps you concentrate while reading, and it actually helps you learn from the text."
(Sherrie Nist-Olejnik and Jodi Patrick Holschuh, College Rules!: How to Study, Survive, and Succeed in College, 3rd ed. Ten Speed Press, 2011)