When you go home in the evening the first thing mentioned is the unusual happening of the day. Those things which have been most out of the ordinary are the first mentioned in your conversation. If some very unusual circumstance has thrust itself upon those at home, they will rush out to meet you, to tell you perhaps that "The cat devoured the canary." All unusual circumstances impress the mind in such a manner that they are very easily recalled. To see the House balanced on one corner instead of in its usual position upon the foundation, will strengthen the impression of the picture already made. Take advantage of this natural fact and when you wish to remember make the picture an unusual one, even make it grotesque or ludicrous. There is no limit to the degree in which you can use these three natural mental operations. Your exaggeration of a pin can make it appear the size of a pencil or a telephone pole, or as tall as a twenty-story building. You can see it move a foot or two or swinging in a pendulum-like rhythm or dancing upon a hill. Thus the use of these three principles makes it possible for you to place upon your brain an impression of whatever strength you choose. If the first one is not recalled readily you know how to make a stronger one. Simply exaggerate the size, move it farther or more rapidly and in a more unusual or ludicrous manner. Value of Improved Imagination The unusualness of this picture is dependent upon your imagination. This idea of picture making for memory purposes is two-fold in its value. It results in a better memory and strengthens the productive imagination. The exercises in Book One will help you to use your imagination for these memory pictures, and making them is one of the best exercises for the development of the imagination. Practice Makes Perfect You now know how to make a strong impression upon your brain. This has proven to be the most valuable aid to a better memory. Thousands of successful men have learned to use it practically in their work. It is the greatest aid to students in assimilating and recalling their studies. You have the knowledge, but to be of value you must practice with it sufficiently to prove its usefulness and to learn to apply it accurately. This practice can be gained in a variety of ways; the essential thing is that you train yourself to make strong visual impressions upon your brain, to see the pictures clearly and to know that you are recalling them accurately. For practice let us use a list of common objects.