Be sure you have a clear, sharp impression of the face, name, date, or facts, which you will need to know at a future time. If you wish to remember a fact, make it meaningful to you. When we are learning, we should try not only to get a strong impression but to obtain as many different kinds of impressions as possible.
Some people can remember colors distinctly, but have a poor memory for shapes.
But anyone, by putting together and using all of the impressions our sense organs bring us about a thing, can remember it much more clearly than if we rely on sight or sound alone. For example, try reading your lesson aloud. In doing this, your eye takes in the appearance of the printed word, your ear passes the sound of the words to your brain, and even the tension of the muscle of your throat add their bit to the total impression which your mind is expected to store away. Try to visualize it. Either remember a diagram or a picture of the material to be remembered, or take short notes about it, which you can visualize.