It's an excellent book. Do at least the important problems suggested by the instructor within the chapter and at the end. Use a lot of paper when you are doing problems and sharpen the pencil. You might keep these papers for future study or to check your answers in the study guide. The rest of the tests are made of similar problems.
Some students find that writing the reactions on index cards is helpful for later review.
Put the reagents on one side, the product and mechanism on the other. Check out the computer programs for the material in the chapters being studied. There are many examples and questions which will help you learn the subject better. Organic chemistry is very interrelated. Your understanding of one topic is dependent on your knowledge of what went before.